Integer comparison

Get two integers from the user, and then output if the first one is less, equal or greater than the other. Test the condition for each case separately, so that all three comparison operators are used in the code.

6502 Assembly

Code is called as a subroutine (i.e. JSR Compare). Specific OS/hardware routines for user input and printing are left unimplemented. <lang 6502asm>Compare PHA ;push Accumulator onto stack JSR GetUserInput ;routine not implemented ;integers to compare now in memory locations A and B LDA A CMP B ;sets flags as if a subtraction (a - b) had been carried out BCC A_less_than_B ;branch if carry clear BEQ A_equals_B ;branch if equal ;else A greater than B JSR DisplayAGreaterThanB;routine not implemented JMP Done A_less_than_B: JSR DisplayALessThanB ;routine not implemented JMP Done A_equals_B: JSR DisplayAEqualsB ;routine not implemented Done: PLA ;restore Accumulator from stack RTS ;return from subroutine</lang>

Ada

<lang ada>with Ada.Text_IO; use Ada.Text_IO; with Ada.Integer_Text_IO; use Ada.Integer_Text_Io;

procedure Compare_Ints is

  A, B : Integer;

begin

  Get(Item => A);
  Get(Item => B);

  -- Test for equality
  if A = B then
     Put_Line("A equals B");
  end if;

  -- Test For Less Than
  if A < B then
     Put_Line("A is less than B");
  end if;

  -- Test For Greater Than
  if A > B then
     Put_Line("A is greater than B");
  end if;

end Compare_Ints;</lang>

Aime

<lang aime>void output(integer a, integer b, text condition) {

   o_integer(a);
   o_text(condition);
   o_integer(b);
   o_byte('\n');

}

integer main(void) {

   if (a < b) {

output(a, b, " is less then ");

   if (a == b) {

output(a, b, " is equal to ");

   if (a > b) {

output(a, b, " is greater than ");

   return 0;

}</lang> Run as:

aime FILE integer a 33 integer b 133

ALGOL 68

Works with: ALGOL 68 version Revision 1 - no extensions to language used

Works with: ALGOL 68G version Any - tested with release 1.18.0-9h.tiny

Works with: ELLA ALGOL 68 version Any (with appropriate job cards) - tested with release 1.8-8d

Note: the standard includes the characters "≤", "≥" and "≠". These appear in the character sets GOST 10859, ISOtech and IBM's EBCDIC e.g. code page 293, and in extended ASCII code pages 910 & 910

The above distributions of both ALGOL 68G and ELLA ALGOL 68 compilers only allow ASCII characters (ASCII has neither "≤", "≥" nor "≠" characters). <lang algol68>main: (

 INT a, b;
 read((a, space, b, new line));

 IF a <= b OR a LE b # OR a ≤ b # THEN
   print((a," is less or equal to ", b, new line))
 FI;
 IF a < b OR a LT b THEN
   print((a," is less than ", b, new line))
 ELIF a = b OR a EQ b THEN
   print((a," is equal to ", b, new line))
 ELIF a > b OR a GT b THEN
   print((a," is greater than ", b, new line))
 FI;
 IF a /= b OR a NE b # OR a ≠ b # THEN
   print((a," is not equal to ", b, new line))
 FI;
 IF a >= b OR a GE b # OR a ≥ b # THEN
   print((a," is greater or equal to ", b, new line))
 FI

)</lang> Example output:

+3 is less or equal to          +4
         +3 is less than          +4
         +3 is not equal to          +4

AppleScript

<lang AppleScript>set n1 to text returned of (display dialog "Enter the first number:" default answer "") as integer set n2 to text returned of (display dialog "Enter the second number:" default answer "") as integer set msg to {n1} if n1 < n2 then set end of msg to " is less than " else if n1 = n2 then set end of msg to " is equal to " else if n1 > n2 then set end of msg to " is greater than " end if set end of msg to n2 return msg as string</lang>

Or... <lang AppleScript>set n1 to text returned of (display dialog "Enter the first number:" default answer "") as integer set n2 to text returned of (display dialog "Enter the second number:" default answer "") as integer if n1 < n2 then return "" & n1 & " is less than " & n2 if n1 = n2 then return "" & n1 & " is equal to " & n2 if n1 > n2 then return "" & n1 & " is greater than " & n2</lang>

AutoHotkey

Error checking is performed automatically by attaching UpDowns to each of the Edit controls. UpDown controls always yield an in-range number, even when the user has typed something non-numeric or out-of-range in the Edit control. The default range is 0 to 100. <lang autohotkey>Gui, Add, Edit Gui, Add, UpDown, vVar1 Gui, Add, Edit Gui, Add, UpDown, vVar2 Gui, Add, Button, Default, Submit Gui, Show Return

ButtonSubmit:

 Gui, Submit, NoHide
 If (Var1 = Var2)
   MsgBox, % Var1 "=" Var2
 Else If (Var1 < Var2)
   MsgBox, % Var1 "<" Var2
 Else If (Var1 > Var2)
   MsgBox, % Var1 ">" Var2

Return

GuiClose:

 ExitApp</lang>

AWK

<lang awk>/[0-9]* [0-9]*/{ if ($1 == $2) print $1, "is equal to", $2 if ($1 < $2) print $1, "is less than", $2 if ($1 > $2) print $1, "is greater than", $2 }</lang>

In awk, a double equals symbol is required to test for equality. A single equals sign is used for assignment, and will cause a bug if it is used within a boolean expression:

<lang awk># This code contains a bug IF (n=3) PRINT "n is equal to 3" # The incorrectly used equals sign will set n to a value of 3</lang>

BASIC

Works with: QuickBasic version 4.5

<lang qbasic>CLS INPUT "a, b"; a, b 'remember to type the comma when you give the numbers PRINT "a is "; IF a b THEN PRINT "greater than "; PRINT "b"</lang>

BBC BASIC

<lang bbcbasic> INPUT "Enter two numbers separated by a comma: " a, b

     CASE TRUE OF
       WHEN a < b: PRINT ;a " is less than "; b
       WHEN a = b: PRINT ;a " is equal to "; b
       WHEN a > b: PRINT ;a " is greater than "; b
     ENDCASE</lang>

Befunge

Befunge only has the greater-than operator (backtick `). The branch commands (underline _ and pipe |) test for zero.

<lang befunge>v v ">" $< >&&"=A",,\:."=B ",,,\: .55+,-:0`|

                     v  "<" _v#<
  @,+55,," B",,,"A " <  "="  <</lang>

Bracmat

<lang bracmat> get$:?A & get$:?B & (!A:!B&out$"A equals B"|) & (!A:<!B&out$"A is less than B"|) & (!A:>!B&out$"A is greater than B"|);</lang>

Burlesque

<lang burlesque> blsq ) "5 6"ps^pcm+.{"The first one is less than the second one""They are both equal""The second one is less than the first one"}\/!!sh The first one is less than the second one blsq ) "6 6"ps^pcm+.{"The first one is less than the second one""They are both equal""The second one is less than the first one"}\/!!sh They are both equal blsq ) "6 5"ps^pcm+.{"The first one is less than the second one""They are both equal""The second one is less than the first one"}\/!!sh The second one is less than the first one </lang>

C

<lang c>#include <stdio.h>

int main() {

 int a, b;
 scanf("%d %d", &a, &b);

 if (a < b)
   printf("%d is less than %d\n", a, b);

 if (a == b)
   printf("%d is equal to %d\n", a, b);

 if (a > b)
   printf("%d is greater than %d\n", a, b);

 return 0;

}</lang>

C++

<lang cpp>#include <iostream> using namespace std;

int main() {

 int a, b;
 cin >> a >> b;

 // test for less-than
 if (a < b)
   cout << a << " is less than " << b << endl;

 // test for equality
 if (a == b)
   cout << a << " is equal to " << b << endl;

 // test for greater-than
 if (a > b)
   cout << a << " is greater than " << b << endl;

}</lang>

C#

<lang csharp>using System;

class Program {

   static void Main()
   {
       int a = int.Parse(Console.ReadLine());
       int b = int.Parse(Console.ReadLine());
       if (a < b)
           Console.WriteLine("{0} is less than {1}", a, b);
       if (a == b)
           Console.WriteLine("{0} equals {1}", a, b);
       if (a > b)
           Console.WriteLine("{0} is greater than {1}", a, b);
   }

}</lang>

Clean

<lang clean>import StdEnv

compare a b

   | a < b = "A is less than B"
   | a > b = "A is more than B"
   | a == b = "A equals B"

Start world

   # (console, world) = stdio world
     (_, a, console) = freadi console
     (_, b, console) = freadi console
   = compare a b</lang>

Clojure

Creates an infinite sequence of calls to "read an object from the user", and assigns the first two elements to a and b, without evaluating the rest. It evaluates the when/println body three times, each time with op and string bound to their corresponding entries in the list of three operator/string pairs. Note that this does no validation on input: if the user inputs a string then an exception will be thrown. <lang Clojure>(let [[a b] (repeatedly read)]

 (doseq [[op string] [[< "less than"]
                      [> "greater than"]
                      [= "equal to"]]]
   (when (op a b)
     (println (str a " is " string " " b)))))</lang>

CMake

<lang cmake># Define A and B as integers. For example:

cmake -DA=3 -DB=5 -P compare.cmake

The comparisons can take variable names, or they can take numbers.
So these act all the same:
A LESS B
${A} LESS ${B}
A LESS ${B}
${A} LESS B

if(A LESS B)

 message(STATUS "${A} is less than ${B}")

endif() if(A EQUAL B)

 message(STATUS "${A} is equal to ${B}")

endif() if(A GREATER B)

 message(STATUS "${A} is greater than ${B}")

endif()</lang>

COBOL

Works with: OpenCOBOL

<lang cobol> IDENTIFICATION DIVISION.

      PROGRAM-ID. Int-Compare.

      DATA DIVISION.
      WORKING-STORAGE SECTION.
      01  A PIC 9(10).
      01  B PIC 9(10).

      PROCEDURE DIVISION.
          DISPLAY "First number: " WITH NO ADVANCING
          ACCEPT A
          DISPLAY "Second number: " WITH NO ADVANCING
          ACCEPT B

*> Note: Longer verbal forms may be used instead of symbols
*> e.g. 'IS GREATER THAN' instead '<'

          IF A < B
              DISPLAY A " is less than " B
          ELSE IF A = B
              DISPLAY A " is equal to " B
          ELSE IF A > B
              DISPLAY A " is larger than " B
          END-IF

          GOBACK
          .</lang>

Common Lisp

You can type this directly into a REPL:

<lang lisp>(let ((a (read *standard-input*))

     (b (read *standard-input*)))
   (cond
     ((not (numberp a)) (format t "~A is not a number." a))
     ((not (numberp b)) (format t "~A is not a number." b))
     ((< a b) (format t "~A is less than ~A." a b))
     ((> a b) (format t "~A is greater than ~A." a b))
     ((= a b) (format t "~A is equal to ~A." a b))
     (t (format t "Cannot determine relevance between ~A and ~B!" a b)))))</lang>

After hitting enter, the REPL is expecting the two numbers right away. You can enter the two numbers, and the result will print immediately. Alternatively, you can wrap this code in a function definition:

<lang lisp>(defun compare-integers ()

 (let ((a (read *standard-input*))
       (b (read *standard-input*)))
   (cond
     ((not (numberp a)) (format t "~A is not a number." a))
     ((not (numberp b)) (format t "~A is not a number." b))
     ((< a b) (format t "~A is less than ~A." a b))
     ((> a b) (format t "~A is greater than ~A." a b))
     ((= a b) (format t "~A is equal to ~A." a b))
     (t (format t "Cannot determine relevance between ~A and ~B!" a b)))))</lang>

Then, execute the function for better control:

(compare-integers)

D

<lang d>import std.stdio, std.conv, std.string;

void main() {

   int a = 10, b = 20;
   try {
       a = to!int(readln().strip());
       b = to!int(readln().strip());
   } catch (StdioException) {}

   if (a < b)
       writeln(a, " is less than ", b);

   if (a == b)
       writeln(a, " is equal to ", b);

   if (a > b)
       writeln(a, " is greater than ", b);

}</lang>

Output:

10 is less than 20

Delphi

Slightly different than the Pascal example

<lang Delphi>program IntegerCompare;

{$APPTYPE CONSOLE}

var

 a, b: Integer;

begin

 if (a < b) then Writeln(a, ' is less than ', b);
 if (a = b) then Writeln(a, ' is equal to ', b);
 if (a > b) then Writeln(a, ' is greater than ', b);

end.</lang>

E

<lang e>def compare(a :int, b :int) {

 println(if (a < b)        { `$a < $b` } \
         else if (a <=> b) { `$a = $b` } \
         else if (a > b)   { `$a > $b` } \
         else              { `You're calling that an integer?` })

}</lang>

ECL

<lang ECL> CompareThem(INTEGER A,INTEGER B) := FUNCTION

 Result            := A <=> B;
 STRING ResultText := CASE (Result,1 => 'is greater than', 0 => 'is equal to','is less than');
 RETURN A + ' ' + TRIM(ResultText) + ' ' + B;

END;

CompareThem(1,2); //Shows "1 is less than 2" CompareThem(2,2); //Shows "2 is equal to 2" CompareThem(2,1); //Shows "2 is greater than 1" </lang>

Efene

since if does pattern matching the else is required to avoid the application from crashing

<lang efene>compare = fn (A, B) {

   if A == B {
       io.format("~p equals ~p~n", [A, B])
   } 
   else { 
       ok
   }

   if A < B {
       io.format("~p is less than ~p~n", [A, B])
   } 
   else { 
       ok
   }

   if A > B {
       io.format("~p is greater than ~p~n", [A, B])
   } 
   else { 
       ok
   }

}

@public run = fn () {

   compare(5, 5)
   compare(6, 5)
   compare(4, 5)

} </lang>

Erlang

   {ok, [N]} = io:fread("First integer: ", "~d"),
   {ok, [M]} = io:fread("First integer: ", "~d"),
   if
       N < M ->
           io:format("~b is less than ~b~n",[N,M]);
       N > M ->
           io:format("~b is greater than ~b~n",[N,M]);
       N == M ->
           io:format("~b is equal to ~b~n",[N,M])
   end.

</lang>

Euphoria

<lang Euphoria>include get.e

integer a,b a = floor(prompt_number("a = ",{})) b = floor(prompt_number("b = ",{}))

puts(1,"a is ") if a < b then

   puts(1,"less then")

elsif a = b then

   puts(1,"equal to")

elsif a > b then

   puts(1,"grater then")

end if puts(1," b")</lang>

Factor

<lang factor>: example ( -- ) readln readln [ string>number ] bi@ [ > [ "A > B" print ] when ] [ < [ "A < B" print ] when ] [ = [ "A = B" print ] when ] 2tri ; </lang>

FALSE

Only equals and greater than are available. <lang false>^^ \$@$@$@$@\ >[\$," is greater than "\$,]? \>[\$," is less than "\$,]? =["characters are equal"]?</lang>

Fantom

Uses Env.cur to access stdin and stdout.

<lang fantom>class Main {

 public static Void main ()
 { 
   try
   {
     Env.cur.out.print ("Enter number 1: ").flush
     num1 := Env.cur.in.readLine.toInt
     Env.cur.out.print ("Enter number 2: ").flush
     num2 := Env.cur.in.readLine.toInt

     if (num1 < num2) 
       echo ("$num1 is smaller than $num2")
     else if (num1 == num2)
       echo ("$num1 is equal to $num2")
     else if (num1 > num2)
       echo ("$num1 is greater than $num2")
   }
   catch (Err e)
     echo ("You must enter two integers")
 }

} </lang>

Fish

This example assumes you pre-populate the stack with the two integers. <lang Fish>l2=?vv ~< v o< v <>l?^"Please pre-populate the stack with the two integers."ar>l?^; \$:@@:@)?v v ;oanv!!!?<

        >$n" is greater than "{r>ol1=^

/ < \$:@@:@=?v v ;oanv!!!?<

        >$n" is equal to "{r>ol1=^

/ < \$:@@:@(?v v ;oanv!!!?<

        >$n" is smaller than "{r>ol1=^
            >        v

/oo". "nooooo" and "n$< v o< >"They're not equal, not greater than and not smaller than eachother... strange."ar>l?^;</lang>

The last three lines aren't really needed, because it will never become true :P but I included them to show a way to do some error checking.

Forth

To keep the example simple, the word takes the two numbers from the stack. <lang forth>: compare-integers ( a b -- )

  2dup < if ." a is less than b" then
  2dup > if ." a is greater than b" then
       = if ." a is equal to b" then ;</lang>

Fortran

In ALL Fortran versions (including original 1950's era) you could use an "arithmetic IF" statement to compare using subtraction: <lang fortran>program arithif integer a, b

c fortran 77 I/O statements, for simplicity read(*,*) a, b

if ( a - b ) 10, 20, 30 10 write(*,*) a, ' is less than ', b

  goto 40

20 write(*,*) a, ' is equal to ', b

  goto 40

30 write(*,*) a, ' is greater than ', b 40 continue

end</lang>

In ANSI FORTRAN 66 or later you could use relational operators (.lt., .gt., .eq., etc.) and unstructured IF statements: <lang fortran>program compare integer a, b c fortran 77 I/O statements, for simplicity read(*,*) a, b

if (a .lt. b) write(*, *) a, ' is less than ', b if (a .eq. b) write(*, *) a, ' is equal to ', b if (a .gt. b) write(*, *) a, ' is greater than ', b end</lang>

In ANSI FORTRAN 77 or later you can use relational operators and structured IF statements: <lang fortran>program compare integer a, b read(*,*) a, b

if (a .lt. b) then

 write(*, *) a, ' is less than ', b

else if (a .eq. b) then

 write(*, *) a, ' is equal to ', b

else if (a .gt. b) then

 write(*, *) a, ' is greater than ', b

end if

end</lang>

In ISO Fortran 90 or later you can use symbolic relational operators (<, >, ==, etc.) <lang fortran>program compare integer :: a, b read(*,*) a, b

if (a < b) then

 write(*, *) a, ' is less than ', b

else if (a == b) then

 write(*, *) a, ' is equal to ', b

else if (a > b) then

 write(*, *) a, ' is greater than ', b

end if

end program compare</lang>

friendly interactive shell

<lang fishshell>read a read b

if test $a -gt $b

   echo Greater

else if test $a -lt $b

   echo Less

else if test $a -eq $b

   echo Equal

end</lang>

Frink

<lang frink> [a,b] = input["Enter numbers",["a","b"]] if a<b

  println["$a < $b"]

if a==b

  println["$a == $b"]

if a>b

  println["$a > $b"]

</lang>

F#

<lang fsharp>let compare_ints a b =

   let r = 
       match a with
       | x when x < b -> -1, printfn "%d is less than %d" x b
       | x when x = b -> 0,  printfn "%d is equal to %d" x b
       | x when x > b -> 1,  printfn "%d is greater than %d" x b
       | x -> 0, printf "default condition (not reached)"
   fst r</lang>

Go

<lang go>package main

import (

   "fmt"
   "bufio"
   "os"
   "strconv"
   "strings"

)

func main() {

   in := bufio.NewReader(os.Stdin)
   getInt := func() int {
       fmt.Print("Integer: ")
       s, err := in.ReadString('\n')
       if err != nil {
           fmt.Println("\nComputer says input error")
           os.Exit(0)
       }
       i, err := strconv.Atoi(strings.TrimSpace(s))
       if err != nil {
           fmt.Println("Not an integer")
           os.Exit(0)
       }
       return i
   }

   n1 := getInt()
   n2 := getInt()

   switch {
   case n1 < n2:  fmt.Println(n1, "less than", n2)
   case n1 == n2: fmt.Println(n1, "equal to", n2)
   case n1 > n2:  fmt.Println(n1, "greater than", n2)
   }

}</lang>

Groovy

Relational Operators

<lang groovy>def comparison = { a, b ->

   println "a ? b    = ${a} ? ${b}    = a ${a < b ? '<' : a > b ? '>' : a == b ? '==' : '?'} b"

}</lang>

Program: <lang groovy>comparison(2000,3) comparison(2000,300000) comparison(2000,2000)</lang>

Output:

a ? b    = 2000 ? 3    = a > b
a ? b    = 2000 ? 300000    = a < b
a ? b    = 2000 ? 2000    = a == b

"Spaceship" (compareTo) Operator

Using spaceship operator and a lookup table: <lang groovy>def comparison = { a, b ->

   def rels = [ (-1) : '<', 0 : '==', 1 : '>' ]
   println "a ? b    = ${a} ? ${b}    = a ${rels[a <=> b]} b"

}</lang>

Program: <lang groovy>comparison(2000,3) comparison(2000,300000) comparison(2000,2000)</lang>

Output:

a ? b    = 2000 ? 3    = a > b
a ? b    = 2000 ? 300000    = a < b
a ? b    = 2000 ? 2000    = a == b

Haskell

<lang haskell>myCompare a b

 | a < b  = "A is less than B"
 | a > b  = "A is greater than B"
 | a == b = "A equals B"

main = do

 a' <- getLine
 b' <- getLine
 let { a :: Integer; a = read a' }
 let { b :: Integer; b = read b' }
 putStrLn $ myCompare a b</lang>

However, the more idiomatic and less error-prone way to do it in Haskell would be to use a compare function that returns type Ordering, which is either LT, GT, or EQ: <lang haskell>myCompare a b = case compare a b of

                 LT -> "A is less than B"
                 GT -> "A is greater than B"
                 EQ -> "A equals B"</lang>

HicEst

<lang hicest>DLG(NameEdit=a, NameEdit=b, Button='OK')

IF (a < b) THEN

   WRITE(Messagebox) a, ' is less than ', b
 ELSEIF(a == b) THEN
   WRITE(Messagebox) a, ' is equal to ', b
 ELSEIF(a > b) THEN
   WRITE(Messagebox) a, ' is greater than ', b

ENDIF</lang>

Icon and Unicon

<lang Icon>procedure main()

until integer(a) do {

  writes("Enter the first integer a := ")
  write(a := read())
  }

until integer(b) do {

  writes("Enter the second integer b := ")
  write(b := read())
  }

writes("Then ") write(a," < ", a < b) write(a," = ", a = b) write(a," > ", a > b) end</lang>

Sample Output:

#int_compare.exe
Enter the first integer a := 7
Enter the second integer b := 7
Then 7 = 7

J

Comparison is accomplished by the verb compare, which provides logical-numeric output.
Text elaborating the output of compare is provided by cti: <lang j>compare=: < , = , >

cti=: dyad define

 select  =. ;@#
 English =. ' is less than ';' is equal to ';' is greater than ' 
 x (":@[, (compare select English"_), ":@]) y

)</lang> Examples of use: <lang j> 4 compare 4 0 1 0

  4 cti 3

4 is greater than 3</lang>

Java

<lang java>import java.io.*;

public class compInt {

  public static void main(String[] args) {
      try {
          BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

          int nbr1 = Integer.parseInt(in.readLine());
          int nbr2 = Integer.parseInt(in.readLine());

          if(nbr1<nbr2)
              System.out.println(nbr1 + " is less than " + nbr2);

          if(nbr1>nbr2)
               System.out.println(nbr1 + " is greater than " + nbr2);

          if(nbr1==nbr2)
               System.out.println(nbr1 + " is equal to " + nbr2);
      } catch(IOException e) { }
  }

}</lang>

JavaScript

<lang javascript> // Using type coercion function compare(a, b) {

 if (a==b) print(a + " equals " + b);
 if (a < b) print(a + " is less than " + b);
 if (a > b) print(a + " is greater than " + b);

}

// Without using type coercion and using standards // Written for browsers // assumption of a and b are both integers if typeof test passes function compare (a, b) {

 if (typeof a === typeof b) {
   if (a === b) {
     document.writeln(a + " equals " + b);
   }
   if (a < b) {
     document.writeln(a + " is less than " + b);
   }
   if (a > b) {
     document.writeln(a + " is greater than " + b);
   }
 } else {
   // "1" and 1 are an example of this as the first is type string and the second is type number
   print(a + "{" + (typeof a) + "} and " + b + "{" + (typeof b) + "} are not of the same type 4and cannot be compared.");
 }

} </lang>

Joy

<lang joy>#!/usr/local/bin/joy.exe DEFINE prompt == "Please enter a number and <Enter>: " putchars; newline == '\n putch; putln == put newline.

stdin # F prompt fgets # S F 10 strtol # A F swap # F A dupd # F A A prompt fgets # S F A A 10 strtol # B F A A popd # B A A dup # B B A A rollup # B A B A [<] [swap put "is less than " putchars putln] [] ifte [=] [swap put "is equal to " putchars putln] [] ifte [>] [swap put "is greater than " putchars putln] [] ifte # B A quit.</lang>

Liberty BASIC

Verbose version: <lang lb>input "Enter an integer for a. ";a input "Enter an integer for b. ";b

'a=int(a):b=int(b) ??? print "Conditional evaluation." if ab then print "a>b " ; a ; " > " ; b

print "Select case evaluation." select case

   case (a<b)
       print "a<b " ; a ; " < " ; b
   case (a=b)
       print "a=b " ; a ; " = " ; b
   case (a>b)
       print "a>b " ; a ; " > " ; b

end select

</lang>

Concise: <lang lb>input "Enter an integer for a. ";a input "Enter an integer for b. ";b

for i = 1 to 3

   op$=word$("< = >", i)
   if eval("a"+op$+"b") then print "a"+op$+"b " ; a;" ";op$;" ";b

next </lang>

LLVM

Note, this targets the mingw-32 ABI.

Library: cstdlib

<lang llvm>; ModuleID = 'test.o'

e means little endian
p: { pointer size : pointer abi : preferred alignment for pointers }
i same for integers
v is for vectors
f for floats
a for aggregate types
s for stack objects
n: {size:size:size...}, best integer sizes

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"

this was compiled with mingw32; thus it must be linked to a compatible c library

target triple = "i386-mingw32"

Declare string constants

@.str = private constant [6 x i8] c"%d %d\00", align 1 ; <[6 x i8]*> [#uses=1] @.str1 = private constant [20 x i8] c"%d is less than %d\0A\00", align 1 ; <[20 x i8]*> [#uses=1] @.str2 = private constant [19 x i8] c"%d is equal to %d\0A\00", align 1 ; <[19 x i8]*> [#uses=1] @.str3 = private constant [23 x i8] c"%d is greater than %d\0A\00", align 1 ; <[23 x i8]*> [#uses=1]

Declare main function (entry point). It does not throw any exceptions, and returns an integer of size 32.

define i32 @main() nounwind {

Entry block

entry:

 ;Allocate the first integer, register %a will point to that
 %a = alloca i32, align 4                        ; <i32*> [#uses=4]
 ;Allocate the second integer, register %b will point to that
 %b = alloca i32, align 4                        ; <i32*> [#uses=4]
 ;Use the C standard library function scanf() to obtain input from users.
 ;Scanf takes a pointer to the string constant @.str, "%d %d\00", which will take two integers from the user.
 ;getelementptr basically does pointer math, in this case, no ptr math is required (we point to the beginning of @.str).
 ;Pass %a and %b, which are pointers to integers allocated previously.
 ;Scanf will store the two integers into the memory locations represented by %a and %b
 %0 = call i32 (i8*, ...)* @scanf(i8* noalias getelementptr inbounds ([6 x i8]* @.str, i32 0, i32 0), i32* %a, i32* %b) nounwind ; <i32> [#uses=0]
 ;Load the integer pointed to by %a and %b into registers %1 and %2 respectively
 %1 = load i32* %a, align 4                      ; <i32> [#uses=3]
 %2 = load i32* %b, align 4                      ; <i32> [#uses=3]
 ;Boolean register which represents if %1 is less than to %2
 %3 = icmp slt i32 %1, %2                        ; <i1> [#uses=1]
 ;If %1 is less than to %2, goto branch %bb, otherwise, goto %bb1
 br i1 %3, label %bb, label %bb1

If integer %1 is less than %2

bb: ; preds = %entry

 ;Use the C standard library function printf to output information to users
 ;Print @.str1, "%d is less than %d\0A\00"
 ;Additionally, pass the integers %1 and %2 to printf, to be formatted into the string
 %4 = call i32 (i8*, ...)* @printf(i8* noalias getelementptr inbounds ([20 x i8]* @.str1, i32 0, i32 0), i32 %1, i32 %2) nounwind ; <i32> [#uses=0]
 ;Continue on to %bb1, to check for equality of the two integers
 br label %bb1

Continue checking if the integers are equal

bb1: ; preds = %bb, %entry

 ;Boolean register which represents if %1 is equal to %2
 %5 = icmp eq i32 %1, %2                         ; <i1> [#uses=1]
 ;If %1 is equal to %2, goto branch %bb2, otherwise, goto %bb3
 br i1 %5, label %bb2, label %bb3

If integer %1 is equal to %2

bb2: ; preds = %bb1

 ;Use the C standard library function printf to output information to users
 ;Print @.str2 "%d is equal to %d\0A\00"
 ;Additionally, pass the integers %1 and %2 to printf, to be formatted into the string
 %6 = call i32 (i8*, ...)* @printf(i8* noalias getelementptr inbounds ([19 x i8]* @.str2, i32 0, i32 0), i32 %1, i32 %2) nounwind ; <i32> [#uses=0]
 ;Continue on to %bb3, to check if %1 is greater than %2
 br label %bb3

Continue checking if %1 is greater than %2

bb3: ; preds = %bb2, %bb1

 ;Boolean register which represents if %1 is greater than %2
 %7 = icmp sgt i32 %1, %2                      ; <i1> [#uses=1]
 ;If %1 is greather than %2, goto branch %bb4, otherwise, goto %bb5
 br i1 %7, label %bb4, label %bb5

If integer %1 is greater than %2

bb4: ; preds = %bb3

 ;Use the C standard library function printf to output information to users
 ;Print @.str3 "%d is greater than %d\0A\00"
 ;Additionally, pass the integers %1 and %2 to printf, to be formatted into the string
 %8 = call i32 (i8*, ...)* @printf(i8* noalias getelementptr inbounds ([23 x i8]* @.str3, i32 0, i32 0), i32 %1, i32 %2) nounwind ; <i32> [#uses=0]
 ;Return 0 for the main function, indicating program executed successfully
 ret i32 0

bb5: ; preds = %bb3

 ;Return 0 for the main function, indicating program executed successfully
 ret i32 0

}

Declare external fuctions

declare i32 @scanf(i8* nocapture, ...) nounwind

declare i32 @printf(i8* nocapture, ...) nounwind </lang>

Logo

<lang logo>to compare :a :b

 if :a = :b [(print :a [equals] :b)]
 if :a < :b [(print :a [is less than] :b)]
 if :a > :b [(print :a [is greater than] :b)]

end</lang> Each infix operator has prefix synonyms (equalp, equal?, lessp, less?, greaterp, greater?), where the 'p' stands for "predicate" as in Lisp.

Lua

<lang lua>print('Enter the first number: ') a = tonumber(io.stdin:read()) print('Enter the second number: ') b = tonumber(io.stdin:read())

if a b then print(a .. " is greater than " .. b) end if a == b then print(a .. " is equal to " .. b) end</lang>

In lua, a double equals symbol is required to test for equality. A single equals sign is used for assignment, and will cause an error during jit precompilation, if it is used within a boolean expression:

<lang lua>-- if a = b then print("This will not work")</lang>

LSE64

<lang lse64>over : 2 pick 2dup : over over

compare : 2dup = then " equals" compare : 2dup < then " is less than" compare : 2dup > then " is more than"

show : compare rot , sp ,t sp , nl</lang>

Mathematica

<lang Mathematica>a=Input["Give me the value for a please!"]; b=Input["Give me the value for b please!"]; If[a==b,Print["a equals b"]] If[a>b,Print["a is bigger than b"]] If[a<b,Print["b is bigger than a"]]</lang>

Maxima

<lang maxima>/* all 6 comparison operators (last is "not equal") */ block(

  [a: read("a?"), b: read("b?")],
  if a < b  then print(a, "<",  b),
  if a <= b then print(a, "<=", b),
  if a > b  then print(a, ">",  b),
  if a >= b then print(a, ">=", b),
  if a = b  then print(a, "=",  b),
  if a # b  then print(a, "#",  b))$</lang>

MAXScript

<lang maxscript>a = getKBValue prompt:"Enter value of a:" b = getKBValue prompt:"Enter value of b:" if a b then print "a is greater then b" else if a == b then print "a is equal to b"</lang>

Metafont

<lang metafont>message "integer 1: "; a1 := scantokens readstring; message "integer 2: "; a2 := scantokens readstring; if a1 < a2:

 message decimal a1 & " is less than " & decimal a2

elseif a1 > a2:

 message decimal a1 & " is greater than " & decimal a2

elseif a1 = a2:

 message decimal a1 & " is equal to " & decimal a2

fi; end</lang>

ML/I

This reads the two numbers from 'standard input' or similar, and outputs the results to 'standard output' or equivalent. Note that ML/I only has tests for equality, greater-than, and greater-than-or-equal.

<lang ML/I>"" Integer comparison "" assumes macros on input stream 1, terminal on stream 2 MCSKIP MT,<> MCSKIP SL WITH ~ MCINS %. MCDEF SL SPACES NL AS <MCSET T1=%A1. MCSET T2=%A2. MCGO L1 UNLESS T1 EN T2 %A1. is equal to %A2. %L1.MCGO L2 UNLESS %A1. GR %A2. %A1. is greater than %A2. %L2.MCGO L3 IF %A1. GE %A2. %A1. is less than %A2. %L3. MCSET S10=0 > MCSET S1=1 ~MCSET S10=2</lang>

MMIX

Some simple error checking is included. <lang mmix>// main registers p IS $255 % pointer pp GREG % backup for p A GREG % first int B GREG % second int

// arg registers argc IS $0 argv IS $1

LOC Data_Segment GREG @ ERR BYTE "Wrong number of arguments",#a,0 ILLH BYTE "Argument -> ",0 ILLT BYTE " <- contains an illegal character",#a,0 LT BYTE "A is less than B",#a,0 EQ BYTE "A equals B",#a,0 GT BYTE "A is greater than B",#a,0

LOC #1000 GREG @ // call: p points to the start of a 0-terminated numeric string // leading chars + and - are allowed // reg $72 0 if negative int // reg $73 gen. purpose // return: reg $70 contains integer value readInt XOR $70,$70,$70 % reset result reg: N=0. LDA pp,p % remember &p LDBU $72,p CMP $73,$72,'+' % ignore '+' BZ $73,2F CMP $72,$72,'-' BNZ $72,1F 2H INCL p,1 JMP 1F % repeat 3H CMP $73,$71,'0' % if c < '0' or c > '9' BN $73,4F % then print err and halt program CMP $73,$71,'9' BP $73,4F SUB $71,$71,'0' % 'extract' number MUL $70,$70,10 ADD $70,$70,$71 % N = 10 * N + digit INCL p,1 1H LDBU $71,p % get next digit PBNZ $71,3B % until end of string CMP $72,$72,0 BNZ $72,2F % if marked negative NEG $70,$70 % then make negative 2H GO $127,$127,0 % return (N)

4H LDA p,ILLH TRAP 0,Fputs,StdErr LDA p,pp TRAP 0,Fputs,StdErr LDA p,ILLT TRAP 0,Fputs,StdErr TRAP 0,Halt,0

// entrance of program // e.g. ~> mmix compare2ints A B // Main CMP p,argc,3 % main (argc, argv) { BZ p,1F % if argc == 3 then continue LDA p,ERR % else print wrong number of args TRAP 0,Fputs,StdErr TRAP 0,Halt,0 // get ints A and B 1H LDOU p,argv,8 % fetch addres of first int GO $127,readInt % read int A ADD A,$70,0

LDOU p,argv,16 GO $127,readInt % read int B ADD B,$70,0

// perform comparison CMP A,A,B % case compare A B LDA p,LT BN A,2F % LT: print 'LT' LDA p,EQ BZ A,2F % EQ: print 'EQ' LDA p,GT % _ : print 'GT' 2H TRAP 0,Fputs,StdOut % print result TRAP 0,Halt,0</lang> Example of use:

~/MIX/MMIX/Progs> mmix compare2ints 121 122
A is less than B

~/MIX/MMIX/Progs> mmix compare2ints 121 121
A equals B

~/MIX/MMIX/Progs> mmix compare2ints 121 120
A is greater than B

~/MIX/MMIX/Progs> mmix compare2ints -121 -122
A is greater than B

~/MIX/MMIX/Progs> mmix compare2ints -121 -121
A equals B

~/MIX/MMIX/Progs> mmix compare2ints -121 -120
A is less than B

Modula-2

<lang modula2>MODULE IntCompare;

IMPORT InOut;

VAR

 A, B: INTEGER;

BEGIN

 InOut.ReadInt(A);
 InOut.ReadInt(B);
 InOut.WriteInt(A, 1);

 IF A < B THEN
   InOut.WriteString(' is less than ')
 ELSIF A = B THEN
   InOut.WriteString(' is equal to ')
 ELSE
   InOut.WriteString(' is greater than ')
 END;
 InOut.WriteInt(B, 1);
 InOut.WriteLn

END IntCompare.</lang>

Modula-3

<lang modula3>MODULE Main;

FROM IO IMPORT Put, GetInt; FROM Fmt IMPORT Int;

VAR a,b: INTEGER;

BEGIN

 a := GetInt();
 b := GetInt();
 IF a < b THEN
   Put(Int(a) & " is less than " & Int(b) & "\n");
 ELSIF a = b THEN
   Put(Int(a) & " is equal to " & Int(b) & "\n");
 ELSIF a > b THEN
   Put(Int(a) & " is greater than " & Int(b) & "\n");
 END;

END Main.</lang>

МК-61/52

Input: a ^ b

Output: 1 (a > b) | -1 (a < b) | 0 (a = b)

MUMPS

<lang>INTCOMP

NEW A,B

INTCOMPREAD

READ !,"Enter an integer to test: ",A
READ !,"Enter another integer: ",B
IF (+A\1'=A)!(+B\1'=B) WRITE !!,"Please enter two integers.",! GOTO INTCOMPREAD
IF AB WRITE !,A," is greater than ",B
KILL A,B
QUIT</lang>

Output:

USER>d INTCOMP^ROSETTA Enter an integer to test: 43 Enter another integer: 44 43 is less than 44 USER>d INTCOMP^ROSETTA Enter an integer to test: 44 Enter another integer: 43 44 is greater than 43 USER>d INTCOMP^ROSETTA Enter an integer to test: 2 Enter another integer: 2 2 is equal to 2
Nemerle
Showing both the use of comparison operators and the .Net Int32.CompareTo() method. <lang Nemerle>using System; using System.Console;
module IntComp {
Main() : void { def ReadInt() : int {Int32.Parse(ReadLine())} def WriteResult(x : int, y : int, res : string) : void {WriteLine($"$x is $res $y")} def a = ReadInt(); def b = ReadInt(); match(a) { |a when a > b => WriteResult(a, b, "greater than") |a when a WriteResult(a, b, "less than") |a when a == b => WriteResult(a, b, "equal to") } def x = a.CompareTo(b); match(x) { |x when x > 0 => WriteResult(a, b, "greater than") |x when x < 0 => WriteResult(a, b, "less than") |x when x == 0 => WriteResult(a, b, "equal to") } }
}</lang>
NetRexx
<lang NetRexx>/* NetRexx */ options replace format comments java crossref symbols nobinary
numL = 0 numR = 0 loop label running forever
say 'Provide two integers [or anything else to stop]:' parse ask numL numR . if \numL.datatype('w') | \numR.datatype('w') then leave running if numL < numR then say numL 'is less than' numR if numL = numR then say numL 'is equal to' numR if numL > numR then say numL 'is greater than' numR end running
return </lang>
NSIS
Pure NSIS (Using IntCmp directly)
<lang nsis> Function IntergerComparison Push $0 Push $1 StrCpy $0 8 StrCpy $1 2
IntCmp $0 $1 Equal Val1Less Val1More
Equal: DetailPrint "$0 = $1" Goto End Val1Less: DetailPrint "$0 < $1" Goto End Val1More: DetailPrint "$0 > $1" Goto End End:
Pop $1 Pop $0 FunctionEnd </lang>
Using LogicLib (bundled library)
Library: LogicLib
<lang nsis> Function IntegerComparison Push $0 Push $1
StrCpy $0 8 StrCpy $1 2
${If} $0 == $1 DetailPrint "$0 = $1" ${ElseIf} $0 < $1 DetailPrint "$0 < $1" ${ElseIf} $0 > $1 DetailPrint "$0 > $1" ${EndIf}
Pop $1 Pop $0 FunctionEnd </lang>
Oberon-2
<lang oberon2>MODULE Compare;
IMPORT In, Out;
VAR a,b: INTEGER;
BEGIN
In.Int(a); In.Int(b); IF a b THEN Out.Int(a,0); Out.String(" is greater than "); Out.Int(b,0); Out.Ln; END;
END Compare.</lang>
Objeck
<lang objeck> bundle Default {
class IntCompare { function : Main(args : String[]) ~ Nil { a := Console->GetInstance()->ReadString()->ToInt(); b := Console->GetInstance()->ReadString()->ToInt();
if (a < b) { Console->GetInstance()->Print(a)->Print(" is less than ")->PrintLine(b); };
if (a = b) { Console->GetInstance()->Print(a)->Print(" is equal than ")->PrintLine(b); };
if (a > b) { Console->GetInstance()->Print(a)->Print(" is greater than ")->PrintLine(b); }; } }
} </lang>
OCaml
<lang ocaml>let my_compare a b =
if a b then "A is greater than B" else if a = b then "A equals B" else "cannot compare NANs"
let () =
let a = read_int () and b = read_int () in print_endline (my_compare a b)</lang>
Octave
<lang octave>printf("Enter a: "); a = scanf("%d", "C"); printf("Enter b: "); b = scanf("%d", "C"); if (a > b)
disp("a greater than b");
elseif (a == b)
disp("a equal to b");
elseif (a < b)
disp("a less than b");
endif</lang>
Oz
<lang oz>functor import
Application(exit) Open(text file)
define
Txt = class from Open.file Open.text end Stdout = {New Open.file init(name:stdout)} Stdin = {New Txt init(name:stdin)}
proc{Print Msg}
{Stdout write(vs:Msg)}
end
fun{GetInt Prompt}
{Print Prompt} {StringToInt {Stdin getS($)}}
end
Int1 = {GetInt "Enter 1st Integer:"} Int2 = {GetInt "Enter 2nd Integer:"}
if(Int1 < Int2) then {Print Int1#" less than "#Int2} end if(Int1 > Int2) then {Print Int1#" greater than "#Int2} end if(Int1 == Int2) then {Print Int1#" equal to "#Int2} end
{Application.exit 0} end</lang>
PARI/GP
<lang parigp>a=input(); b=input(); if(a<b, print(a" < "b)); if(a==b, print(a" = "b)); if(a>b, print(a" > "b));</lang>
Pascal
<lang pascal>program compare(input, output);
var
a, b: integer;
begin
write('Input an integer number: '); readln(a); write('Input another integer number: '); readln(b); if (a < b) then writeln(a, ' is less than ', b); if (a = b) then writeln(a, ' is equal to ', b); if (a > b) then writeln(a, ' is greater than ', b);
end.</lang>
Perl
Works with: Perl version 5.x
Separate tests for less than, greater than, and equals
<lang perl>sub test_num {
my $f = shift; my $s = shift; if ($f < $s){ return -1; # returns -1 if $f is less than $s } elsif ($f > $s) { return 1; # returns 1 if $f is greater than $s } elsif ($f == $s) {
= operator is an assignment

== operator is a numeric comparison
return 0; # returns 0 $f is equal to $s };
};</lang>
All three tests in one. If $f is less than $s return -1, greater than return 1, equal to return 0
<lang perl>sub test_num {
return $_[0] <=> $_[1];
};</lang> Note: In Perl, $a and $b are (kind of) reserved identifiers for the built-in sort function. It's good style to use more meaningful names, anyway.
<lang perl># Get input, test and display print "Enter two integers: "; ($x, $y) = split ' ', <>; print $x, (" is less than ", " is equal to ",
" is greater than ")[test_num($x, $y) + 1], $y, "\n";</lang>
Perl 6
<lang perl6>my $a = prompt("1st int: ").floor; my $b = prompt("2nd int: ").floor;
if $a < $b {
say 'Less';
} elsif $a > $b {
say 'Greater';
} elsif $a == $b {
say 'Equal';
}</lang>
With <=>:
<lang perl6>say <Less Equal Greater>[($a <=> $b) + 1];</lang>
A three-way comparison such as <=> actually returns an Order enum which stringifies into 'Decrease', 'Increase' or 'Same'. So if it's ok to use this particular vocabulary, you could say that this task is actually a built in:
<lang Perl6>say prompt("1st int: ") <=> prompt("2nd int: ");</lang>
PHL
<lang phl>module intergertest;
extern printf; extern scanf;
@Integer main [ var a = 0; var b = 0; scanf("%i %i", ref (a), ref (b));
if (a < b) printf("%i is less than %i\n", a::get, b::get);
if (a == b) printf("%i is equal to %i\n", a::get, b::get);
if (a > b) printf("%i is greater than %i\n", a::get, b::get);
return 0; ]</lang>
PHP
<lang php><?php
echo "Enter an integer [int1]: "; fscanf(STDIN, "%d\n", $int1); if(!is_numeric($int1)) {
echo "Invalid input; terminating.\n"; exit(1); // return w/ general error
}
echo "Enter an integer [int2]: "; fscanf(STDIN, "%d\n", $int2); if(!is_numeric($int2)) {
echo "Invalid input; terminating.\n"; exit(1); // return w/ general error
}
// now $int1 and $int2 are numbers. // for simplicity, this does not explicitly examine types
if($int1 < $int2)
echo "int1 < int2\n";
if($int1 == $int2)
echo "int1 = int2\n";
if($int1 > $int2)
echo "int1 > int2\n";
?></lang> Note that this works from the command-line interface only, whereas PHP is usually executed as wp:Common_Gateway_Interface CGI.
PicoLisp
<lang PicoLisp>(prin "Please enter two values: ")
(in NIL # Read from standard input
(let (A (read) B (read)) (prinl "The first one is " (cond ((> A B) "greater than") ((= A B) "equal to") (T "less than") ) " the second." ) ) )</lang>
Output:
Please enter two values: 4 3 The first one is greater than the second.
Pike
<lang pike>int main(int argc, array(int) argv){
if(argc != 3){ write("usage: `pike compare-two-ints.pike <x> <y>` where x and y are integers.\n"); return 0; } int a = argv[1]; int b = argv[2];
if(a > b) { write(a + " is greater than " + b + "\n"); } else if (a < b) { write(a + " is less than " + b + "\n"); } else { write(a + " is equal to " + b + "\n"); }
}</lang>
PL/I
<lang PL/I> declare (a, b) fixed binary;
get list (a, b); if a = b then
put skip list ('The numbers are equal');
if a > b then
put skip list ('The first number is greater than the second');
if a 
Pop11
<lang pop11>;;; Comparison procedure define compare_integers(x, y); if x > y then
printf('x is greater than y\n');
elseif x < y then
printf('x is less than y\n');
elseif x = y then
printf('x equals y\n');
endif; enddefine;
Setup token reader
vars itemrep; incharitem(charin) -> itemrep;
Read numbers and call comparison procedure
compare_integers(itemrep(), itemrep());</lang>
PowerShell
<lang powershell>$a = [int] (Read-Host a) $b = [int] (Read-Host b)
if ($a -lt $b) {
Write-Host $a is less than $b`.
} elseif ($a -eq $b) {
Write-Host $a is equal to $b`.
} elseif ($a -gt $b) {
Write-Host $a is greater than $b`.
}</lang>
PureBasic
<lang PureBasic>If OpenConsole()
Print("Enter an integer: ") x.i = Val(Input()) Print("Enter another integer: ") y.i = Val(Input())
If x < y Print( "The first integer is less than the second integer.") ElseIf x = y Print("The first integer is equal to the second integer.") ElseIf x > y Print("The first integer is greater than the second integer.") EndIf
Print(#CRLF$ + #CRLF$ + "Press ENTER to exit") Input() CloseConsole()
EndIf</lang>
Python
<lang Python>#!/usr/bin/env python a = int(raw_input('Enter value of a: ')) b = int(raw_input('Enter value of b: '))
if a < b:
print 'a is less than b'
elif a > b:
print 'a is greater than b'
elif a == b:
print 'a is equal to b'</lang>
(Note: in Python3 raw_input() will become input().).
An alternative implementation could use a Python dictionary to house a small dispatch table to be indexed by the results of the built-in cmp() function. cmp() returns a value suitable for use as a comparison function in a sorting algorithm: -1, 0 or 1 for <, = or > respectively. Thus we could use:
Works with: Python version 2.x only, not 3.x
<lang Python>#!/usr/bin/env python import sys try:
a = int(raw_input('Enter value of a: ')) b = int(raw_input('Enter value of b: '))
except (ValueError, EnvironmentError), err:
print sys.stderr, "Erroneous input:", err sys.exit(1)
dispatch = {
-1: 'is less than', 0: 'is equal to', 1: 'is greater than' } print a, dispatch[cmp(a,b)], b</lang>
In this case the use of a dispatch table is silly. However, more generally in Python the use of dispatch dictionaries or tables is often preferable to long chains of elif' clauses in a condition statement. Python's support of classes and functions (including currying, partial function support, and lambda expressions) as first class objects obviates the need for a "case" or "switch" statement.
R
<lang R>print("insert number a") a <- scan(what=numeric(0), nmax=1) print("insert number b") b <- scan(what=numeric(0), nmax=1) if ( a b ) {
print("a is greater than b")
} else if ( a == b ) { # could be simply else of course...
print("a and b are the same")
}</lang>
Racket
<lang Racket>#lang racket (define (compare-two-ints a b)
(define compared (cond ((> a b) "is greated than") ((= a b) "equals") ((< a b) "is lesser than"))) (format "~a ~a ~a" a compared b))
(compare-two-ints (read) (read))</lang>
Raven
<lang Raven>"Enter the first number: " print expect trim 1.1 prefer as $a "Enter the second number: " print expect trim 1.1 prefer as $b
$a $b < if $b $a "%g is less than %g\n" print $a $b > if $b $a "%g is greater than %g\n" print $a $b = if $b $a "%g is equal to %g\n" print</lang>
REBOL
<lang REBOL> REBOL [ Title: "Comparing Two Integers" Author: oofoe Date: 2009-12-04 URL: http://rosettacode.org/wiki/Comparing_two_integers ]
a: ask "First integer? " b: ask "Second integer? "
relation: [ a b "greater than" ] print [a "is" case relation b] </lang>
Retro
Taking the numbers from the stack:
<lang Retro>: example ( ab- )
cons [ do > [ "A > B\n" puts ] ifTrue ] [ do < [ "A < B\n" puts ] ifTrue ] [ do = [ "A = B\n" puts ] ifTrue ] tri ;</lang>
Or, to parse for numbers:
<lang Retro>: example ( ab- )
getToken getToken &toNumber bi@ cons [ do > [ "A > B\n" puts ] ifTrue ] [ do < [ "A < B\n" puts ] ifTrue ] [ do = [ "A = B\n" puts ] ifTrue ] tri ;</lang>
REXX
<lang REXX>/*REXX program prompts for two integers, compares 'em, tells results. */ numeric digits 1000 /*for the users that go ka-razy. */ a=getInt('─────── Please enter your first integer:') /*get 1st integer.*/ b=getInt('─────── Please enter your second integer:') /*get 2nd integer.*/
if ab then say a ' is greater than ' b
exit /*stick a fork in it, we're done.*/ /*──────────────────────────────────GETINT subroutine───────────────────*/ getInt: procedure /*prompt the CBLF, get an integer*/
/*¬geeks: Carbon-Based Life Form.*/ do forever /*keep prompting until success. */ say; say arg(1) /*display the prompt message. */ parse pull x /*get X, and keep its case intact*/ select when x= then call serr 'Nothing was entered.' when words(x)>1 then call serr 'Too many arguments entered.' when \datatype(x,'N') then call serr "Argument isn't numeric:" x when \datatype(x,'W') then call serr "Argument isn't an integer:" x otherwise return x /*Eureka! Return x to invoker.*/ end /*select*/ end /*forever*/
/*──────────────────────────────────SERR subroutine─────────────────────*/ serr: say '***error!*** ' arg(1); say "Please try again."; return</lang> output (shows user input and computer output together):
─────── Please enter your first integer: bupkis ***error!*** Argument isn't numeric: bupkis Please try again. ─────── Please enter your first integer: 3 and 4 ***error!*** Too many arguments entered. Please try again. ─────── Please enter your first integer: 5.6 ***error!*** Argument isn't an integer: 5.6 Please try again. ─────── Please enter your first integer: +6 ─────── Please enter your second integer: 17 +6 is less than 17
Note: while the above obeys the task's requirement (to use all operators), this seems to be more elegant (and efficient): <lang>Select
When ab */ say a ' is greater than ' b End
</lang>
Ruby
This uses Kernel#gets to get input from STDIN, and String#to_i to convert the string into an integer. (Without this conversion, Ruby would compare strings: 5 < 10 but "5" > "10".)
<lang ruby>a = (print "enter a value for a: "; gets).to_i b = (print "enter a value for b: "; gets).to_i
puts "#{a} is less than #{b}" if a b puts "#{a} is equal to #{b}" if a == b</lang>
Another way:
<lang ruby>a = (print "enter a value for a: "; gets).to_i b = (print "enter a value for b: "; gets).to_i
case a <=> b when -1; puts "#{a} is less than #{b}" when 0; puts "#{a} is equal to #{b}" when +1; puts "#{a} is greater than #{b}" end</lang>
Example input and output:
$ ruby compare.rb enter a value for a: 5 enter a value for b: 10 5 is less than 10 $ ruby compare.rb enter a value for a: cat enter a value for b: dog 0 is equal to 0

Translation of: Python
An alternative method, which is similar to the python version mentioned above (at the time of writing this) is: <lang ruby># Function to make prompts nice and simple to abuse def prompt str
print str, ": " gets.chomp
end
Get value of a
a = prompt('Enter value of a').to_i
Get value of b
b = prompt('Enter value of b').to_i
The dispatch hash uses the <=> operator

When doing x<=>y:

-1 means x is less than y

0 means x is equal to y

1 means x is greater than y
dispatch = {
-1 => "less than", 0 => "equal to", 1 => "greater than"
}
I hope you can figure this out
puts "#{a} is #{dispatch[a<=>b]} #{b}"</lang>

Run BASIC
<lang runbasic>input "1st number:"; n1 input "2nd number:"; n2
if n1 < n2 then print "1st number ";n1;" is less than 2nd number";n2 if n1 > n2 then print "1st number ";n1;" is greater than 2nd number";n2 if n1 = n2 then print "1st number ";n1;" is equal to 2nd number";n2</lang>
SAS
<lang sas>/* Showing operators and their fortran-like equivalents. Note that ~= and ^= both mean "different" */ data _null_; input a b; put a= b=; if a = b then put "a = b"; if a ^= b then put "a ^= b"; if a ~= b then put "a ~= b"; if a b then put "a > b"; if a <= b then put "a <= b"; if a >= b then put "a >= b"; if a eq b then put "a eq b"; if a ne b then put "a ne b"; if a lt b then put "a lt b"; if a gt b then put "a gt b"; if a le b then put "a le b"; if a ge b then put "a ge b"; cards; 1 2 2 1 1 1

run;</lang>
Scala
<lang scala>object IntCompare {
def main(args: Array[String]): Unit = { val a=Console.readInt val b=Console.readInt if (a < b) printf("%d is less than %d\n", a, b) if (a == b) printf("%d is equal to %d\n", a, b) if (a > b) printf("%d is greater than %d\n", a, b) }
}</lang>
Scheme
<lang scheme>(define (my-compare a b)
(cond ((< a b) "A is less than B") ((> a b) "A is greater than B") ((= a b) "A equals B")))
(my-compare (read) (read))</lang>
Seed7
<lang seed7>$ include "seed7_05.s7i";
const proc: main is func
local var integer: a is 0; var integer: b is 0; begin readln(a); readln(b);
if a b then writeln(a <& " is greater than " <& b); end if; end func;</lang>
Slate
<lang slate>[ |:a :b |
( a > b ) ifTrue: [ inform: 'a greater than b\n' ]. ( a 
Smalltalk
<lang smalltalk>| a b | 'a = ' display. a := (stdin nextLine asInteger). 'b = ' display. b := (stdin nextLine asInteger). ( a > b ) ifTrue: [ 'a greater than b' displayNl ]. ( a 
SNOBOL4
Comparisons in Snobol are not operators, but predicate functions that return a null string and generate a success or failure value which allows or blocks statement execution, and which can be tested for branching. Other numeric comparisons are ge (>=), le (<=) and ne (!= ). There is also a parallel set of L-prefixed predicates in modern Snobols for lexical string comparison.
<lang SNOBOL4>* # Get user input
output = 'Enter X,Y:' trim(input) break(',') . x ',' rem . y
output = lt(x,y) x ' is less than ' y :s(end) output = eq(x,y) x ' is equal to ' y :s(end) output = gt(x,y) x ' is greater than ' y
end</lang>
SNUSP
There are no built-in comparison operators, but you can (destructively) check which of two adjacent cells is most positive. <lang snusp>++++>++++ a b !/?\<?\# a=b
> - \# a>b - < a
Standard ML
<lang sml>fun compare_integers(a, b) =
if a b then print "A is greater than B\n" if a = b then print "A equals B\n"
fun test () = let open TextIO val SOME a = Int.fromString (input stdIn) val SOME b = Int.fromString (input stdIn) in compare_integers (a, b) end handle Bind => print "Invalid number entered!\n"</lang>
A more idiomatic and less error-prone way to do it in SML would be to use a compare function that returns type order, which is either LESS, GREATER, or EQUAL: <lang sml>fun myCompare (a, b) = case Int.compare (a, b) of
LESS => "A is less than B" | GREATER => "A is greater than B" | EQUAL => "A equals B"</lang>
Tcl
This is not how one would write this in Tcl, but for the sake of clarity:
<lang tcl>puts "Please enter two numbers:"
gets stdin x gets stdin y
if { $x > $y } { puts "$x is greater than $y" } if { $x < $y } { puts "$x is less than $y" } if { $x == $y } { puts "$x equals $y" }</lang>
Other comparison operators are "<=", ">=" and "!=".
Note that Tcl doesn't really have a notion of a variable "type" - all variables are just strings of bytes and notions like "integer" only ever enter at interpretation time. Thus the above code will work correctly for "5" and "6", but "5" and "5.5" will also be compared correctly. It will not be an error to enter "hello" for one of the numbers ("hello" is greater than any integer). If this is a problem, the type can be expressly cast
<lang tcl>if {int($x) > int($y)} { puts "$x is greater than $y" }</lang>
or otherwise type can be checked with "if { string is integer $x }..."
Note that there is no substitution/evaluation here anywhere: entering "3*5" and "15" will parse "3*5" as a non-numerical string (like "hello") and thus the result will be "3*5 is greater than 15".
A variant that iterates over comparison operators, demonstrated in an interactive tclsh: <lang Tcl>% set i 5;set j 6 % foreach {o s} {< "less than" > "greater than" == equal} {if [list $i $o $j] {puts "$i is $s $j"}} 5 is less than 6 % set j 5 % foreach {o s} {< "less than" > "greater than" == equal} {if [list $i $o $j] {puts "$i is $s $j"}} 5 is equal 5 % set j 4 % foreach {o s} {< "less than" > "greater than" == equal} {if [list $i $o $j] {puts "$i is $s $j"}} 5 is greater than 4</lang>
TI-89 BASIC
<lang ti89b>Local a, b, result Prompt a, b If a b Then
">" → result
Else
"???" → result
EndIf Disp string(a) & " " & result & " " & string(b)</lang>
Toka
<lang toka>[ ( a b -- )
2dup < [ ." a is less than b\n" ] ifTrue 2dup > [ ." a is greater than b\n" ] ifTrue = [ ." a is equal to b\n" ] ifTrue
] is compare-integers
1 1 compare-integers 2 1 compare-integers 1 2 compare-integers</lang>
TUSCRIPT
<lang tuscript> $$ MODE TUSCRIPT
ASK "Please enter your first integer:": i1="" ASK "Please enter your second integer:": i2=""
IF (i1!='digits'||i2!='digits') ERROR/STOP "Please insert digits"
IF (i1==i2) PRINT i1," is equal to ",i2 IF (i1<i2) PRINT i1," is less than ",i2 IF (i1>i2) PRINT i1," is greater than ",i2 </lang>
UNIX Shell
There are multiple examples here, because each shell has a different form of the 'read' command.
Works with: ksh93
<lang bash>#!/bin/ksh
tested with ksh93s+
builtin printf
integer a=0 integer b=0
read a?"Enter value of a: " || { print -u2 "Input of a aborted." ; exit 1 ; } read b?"Enter value of b: " || { print -u2 "Input of b aborted." ; exit 1 ; }
if (( a b )) ; then
printf "%d is greater than %d\n" a b
fi
exit 0</lang>
One can backport the previous code to pdksh, which has no builtin printf, but can call /usr/bin/printf as an external program.
Works with: pdksh
<lang bash>#!/bin/ksh
tested with pdksh
integer a=0 integer b=0
read a?"Enter value of a: " || { print -u2 "Input of a aborted." ; exit 1 ; } read b?"Enter value of b: " || { print -u2 "Input of b aborted." ; exit 1 ; }
if (( a b )) ; then
printf "%d is greater than %d\n" $a $b
fi
exit 0</lang>

Works with: Bash
<lang bash>read -p "Enter two integers: " a b
if [ $a -gt $b ]; then comparison="greater than" elif [ $a -lt $b ]; then comparison="less than" elif [ $a -eq $b ]; then comparison="equal to" else comparison="not comparable to" fi
echo "${a} is ${comparison} ${b}"</lang>
V
<lang v>[compare
[ [>] ['less than' puts] [<] ['greater than' puts] [=] ['is equal' puts] ] when].
|2 3 compare
greater than
|3 2 compare
less than
|2 2 compare
is equal</lang>
Vala
<lang vala> void main(){
int a; int b;
stdout.printf("Please type in int 1\n"); a = int.parse(stdin.read_line());
stdout.printf("Please type in int 2\n"); b = int.parse(stdin.read_line());
if (a < b) stdout.printf("%d is less than %d\n", a, b); if (a == b) stdout.printf("%d is equal to %d\n", a, b); if (a > b) stdout.printf("%d is greater than %d\n", a, b);
} </lang>
VBScript
Based on the BASIC
Implementation
<lang vb> option explicit
function eef( b, r1, r2 ) if b then eef = r1 else eef = r2 end if end function
dim a, b wscript.stdout.write "First integer: " a = cint(wscript.stdin.readline) 'force to integer
wscript.stdout.write "Second integer: " b = cint(wscript.stdin.readline) 'force to integer
wscript.stdout.write "First integer is " if a b then wscript.stdout.write "greater than " wscript.echo "Second integer."
wscript.stdout.write "First integer is " & _
eef( a < b, "less than ", _ eef( a = b, "equal to ", _ eef( a > b, "greater than ", vbnullstring ) ) ) & "Second integer."
</lang>
Visual Basic .NET
Platform: .NET
Works with: Visual Basic .NET version 9.0+
<lang vbnet>Sub Main()
Dim a = CInt(Console.ReadLine) Dim b = CInt(Console.ReadLine)
'Using if statements If a b Then Console.WriteLine("a is greater than b")
'Using Case Select Case a Case Is b Console.WriteLine("a is greater than b") End Select
End Sub</lang>
Wart
<lang wart>a <- (read) a <- (read) prn (if (a < b)
: "a is less than b" (a > b) : "a is greater than b" :else : "a equals b")</lang>
XPL0
<lang XPL0>code IntIn=10, Text=12; int A, B; [A:= IntIn(0);
B:= IntIn(0);
if AB then Text(0, "A>B^M^J"); ]</lang>
XSLT
Because XSLT uses XML syntax, the less than and greater than operators which would normally be written '<' and '>' must be escaped using character entities, even inside of XPath expressions.
<lang xml><xsl:template name="compare">
<xsl:param name="a" select="1"/> <xsl:param name="b" select="2"/> <fo:block> <xsl:choose> <xsl:when test="$a < $b">a < b</xsl:when> <xsl:when test="$a > $b">a > b</xsl:when> <xsl:when test="$a = $b">a = b</xsl:when> </xsl:choose> </fo:block></lang> </xsl:template>