Conditional structures

AppleScript

if-then-else

if myVar is "ok" then return true

set i to 0
if i is 0 then
	return "zero"
else if i mod 2 is 0 then
	return "even"
else
	return "odd"
end if

C

if-then-else

Compiler: GCC 4.1.2

int main (int argc, char ** argv) {
  int input = 2;

  if ( 3 == input ) {
    // Do something
  }



  if ( 3 == input ) {
    // Do something
  } else {
    // Do something else
  }
}

switch

Compiler: GCC 4.1.2

int main (int argc, char ** argv) {
  int input = 42;

  switch (input) {
    case 0:
      // Do something, because input = 0
      break;
    case 1:
      // Do something, because input = 1
      break;
    case 2:
      // Do something, because input = 2
    default:
      // Do something else.
      break; // Optional
  }
}

C++

Run-Time Control Structures

if-then-else

Compiler: GCC 4.1.2

int main (void) {
  int input = 2;

  if ( 3 == input ) {
    // Do something
  }

  if ( 3 == input ) {
    // Do something
  } else {
    // Do something else
  }
}

switch

Compiler: GCC 4.1.2

int main (void) {
  int input = 42;

  switch (input) {
    case 0:
      // Do something, because input = 0
      break;
    case 1:
      // Do something, because input = 1
      break;
    case 2:
      // Do something, because input = 2
      // Because there is no 'break', we also fall through
      // into the default case, executing it right after case 2:
    default:
      // Do something else.
      break; // Optional
  }
}

PHP

Interpreter: PHP 3.x & 4.x & 5.x

<?php

$foo = 3;

if ($foo == 2)
  //do something

if ($foo == 3)
  //do something
else
  //do something else

if ($foo != 0)
{

  //do something

}

else
{

  //do another thing

}

?>

See Also

• php.net:Control Structures