Loops/While
< Loops
Loops/While
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
Start a value at 1024. Loop while it is greater than 0. Print the value (with a newline) and divide it by two each time through the loop.
Ada
<ada> declare
I : Integer := 1024;
begin
while I > 0 loop Put_Line(Integer'Image(I)); I := I / 2; end loop;
end; </ada>
BASIC
<qbasic>i = 1024 while i > 0
print i i = i / 2
wend</qbasic>
C
int i = 1024; while(i > 0) { printf("%d\n", i); i /= 2; }
Haskell
Introducing and especially updating a loop variable requires side effects. So it's simpler to just create a list of the required values, and then loop over it to print them. However, that doesn't really reflect the structure of the imperative solutions.
mapM print $ takeWhile (>0) $ iterate (`div` 2) 1024
Java
<java>int i = 1024; while(i > 0){
System.out.println(i); i >>= 1; //also acceptable: i /= 2;
}</java>