Cody is right on this. Just declare the array and the treat it as if it were a 5x5 matrix because as long as you treat it like one, it will be one.

I guess you could do this: 

use strict;
use warnings;

my @matrix;
$matrix[4][4];

[download]
Perl will fill in the array with undef's for you.

update: monarch is correct. It should be 4 because Perl defaults to an index of 0 for arrays unless you set the special variable $[ = 1.

In reply to Re^2: Initializing multidimensional arrays by cyocum
in thread Initializing multidimensional arrays by pearle

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