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There's another case to account for... if $a or $b isn't integer, and their fractional parts differ (i.e. ($a - int $a) != ($b - int $b)) and $a < $b, then

$a = $b unless $error or $a >= $b;

(or similar examples in the thread) has a different result than the OP's code.

I think it muddies the water to test $error every time through the loop, as some of these solutions do, when you only need to test it once. If $a or $b might be non-integer, here's one way to do it:

if ($a < $b and !$error) { $a = int $b + ($a - int $a); $a++ if $a < $b; }

I left out doing the floating point comparisons correctly...

Updated: Fixed a dumb error in the code.

In reply to Re^2: backwards if and while looping by Zed_Lopez
in thread backwards if and while looping by jcpunk

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