ikegami is right on. If you modify the program to round $num after the second assignment of num, as so:

use strict;

my $num=3891.0;
my $answer=$num % 5;

print "num is $num answer is $answer \n";

my $num=38.91 * 100;
my $answer=int($num + 0.5) % 5;

print "num is $num answer is $answer \n";

[download]
You get these answers:

C:\Code>perl modtest.pl
num is 3891 answer is 1
num is 3891 answer is 1

[download]

In reply to Re: Modulus strangeness (%) by dwm042
in thread Modulus strangeness (%) by Anonymous Monk

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