If you aren't doing anything else with them, just loop over the elements themselves instead of the indices. The innermost loop will loop most quickly, of course. So:

#!/usr/bin/env perl 
use strict;
use warnings;

my @array1 = (1, 2, 3);
my @array2 = (qw/a b c/); # Enough to test
my @array3 = (qw/I II III/);

for my $alpha (@array2) {
    for my $roman (@array3) {
        for my $arabic (@array1) {
            print "$arabic,$alpha,$roman\n";
        }
    }
}

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In reply to Re: Printing from three arrays by hippo
in thread Printing from three arrays by oysterperl

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