my $i=99;
while (($i%5)!=0)
    {
    print "$i not evenly divisible by 5.\n";
    $i--;
    }
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my $a='62696c6c77667269656e6440676d61696c2e636f6d';
while ($a=~m/(^.{2})/s)
{print unpack('A',pack('H*',"$1"));$a=~s/^.{2}//s;}
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To check if a number $num is divisible by $divisor, use the modulus operator, %:

if ($num % $divisor) {
    # does not divide cleanly
} else {
    # does.
}
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I am trying to perform a loop, it counts from 0 to $i, and it should do something every $x times, while still looping. Modulus is what I needed.

I just didn't know it was the solution to both of my questions :)

Detonite

Here is a nice chunk of code that uses modulus to control looping:

    my ($returnNum)        = 0;
    for my $block (@blocks) {
        printf ("%-15s ", $block);
        print "\n" unless (++$returnNum % 5);
    }
    print "\n";
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