The following echoes Eily's suggestion:

use strict;
use warnings;

my @AoA;

while (<DATA>) {
    chomp;
    push @AoA, [ split '' ];
}

for my $i ( 0 .. @AoA - 1 ) {
    for my $j ( 0 .. @{ $AoA[0] } - 1 ) {
        print "String $i; Char $j: '$AoA[$i]->[$j]'\n"
    }
    print "\n";
}

__DATA__
String 1.
Another 2
abcdefghi
[download]

Output:

String 0; Char 0: 'S'
String 0; Char 1: 't'
String 0; Char 2: 'r'
String 0; Char 3: 'i'
String 0; Char 4: 'n'
String 0; Char 5: 'g'
String 0; Char 6: ' '
String 0; Char 7: '1'
String 0; Char 8: '.'

String 1; Char 0: 'A'
String 1; Char 1: 'n'
String 1; Char 2: 'o'
String 1; Char 3: 't'
String 1; Char 4: 'h'
String 1; Char 5: 'e'
String 1; Char 6: 'r'
String 1; Char 7: ' '
String 1; Char 8: '2'

String 2; Char 0: 'a'
String 2; Char 1: 'b'
String 2; Char 2: 'c'
String 2; Char 3: 'd'
String 2; Char 4: 'e'
String 2; Char 5: 'f'
String 2; Char 6: 'g'
String 2; Char 7: 'h'
String 2; Char 8: 'i'
[download]

$AoA[$i]->[$j] explained:

$AoA[$i]->[$j]
      ^  ^  ^
      |  |  |
      |  |  + - Character number in string
      |  + - Dereferencing arrow
      + - String number in array
[download]

The above builds an array of arrays (AoA) by splitting each string on an empty string to create a list of the string's characters in an anonymous array whose reference is pushed onto @AoA. The nested loops iterate through the AoA, using the dereferencing arrow -> to access each character. The notation @{ $AoA[0] } - 1 was used to obtain the number of characters in the dereferenced array (effectively the string length), since you mentioned that each string had the same length.

Hope this helps!

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.