Hello agreen54,

As others have said, we won’t write the code for you (PerlMonks is a teaching site, not a code-writing service). But I will give you two hints on possible ways to approach this task:

1. Use a C-style for loop to iterate over the indices of the two arrays. See perlsyn#For-Loops. Update: GrandFather (below) is of course correct, prefer a Perl-style for loop! (What was I thinking?) See perlsyn#Foreach-Loops.

2. Look at the pairwise function in the module List::MoreUtils.

Hope that helps,

A Perl style for loop to iterate over the indices is clearer and more Perlish (whatever that means) ;).

True laziness is hard work

...and within that "Perl style" loop, insert the "pseudocode" you wrote above:

"i need to subtract first row second column from array1 with first row second column from array2 and goes on for all the rows assign the difference to a variable"

Two arrays, subtraction operation, assigning the difference to a variable. I'd say you are more than halfway towards a solution. :)

Ok, so what have you tried? How can we help you fix code you haven't shown us?

use strict;
use warnings;
use Data::Dumper;

# your code for creating @array1 and @array2 goes here

print Dumper(\@array1);
print Dumper(\@array2);
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