in reply to Perl & modulus

What kind of loop are you trying to perform?
This modulus loop runs, hope this gets you in the right direction: 
my $i=99;
while (($i%5)!=0)
    {
    print "$i not evenly divisible by 5.\n";
    $i--;
    }

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-Kevin 
my $a='62696c6c77667269656e6440676d61696c2e636f6d';
while ($a=~m/(^.{2})/s)
{print unpack('A',pack('H*',"$1"));$a=~s/^.{2}//s;}

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In Section Seekers of Perl Wisdom