You can loop thru your array or map the array, and perform whatever math you want on each element. But if you are talking about math operations on the ENTIRE array, you are looking at vector math. See PDL, it's piddles are arrays which can have math done on the entire array in one step. See PDL homepage and The PDL Newbook tutorial

But here is a simple map usage:

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

my @array = ( 1..10  );
print "@array\n";

my @mult = map { $_ * 2 } @array;
print "@mult\n";
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