I am working on this tutorial and the exercise asks us to use $" and add a # to the start of every line in a file. I used this code: 
use strict;

my $file = 'names.txt';        # Name the file
open(INFO, "$file");    # Open for appending
$" = "\#";
my @lines = <INFO>;        # Read it into an array
print INFO "@lines";
close(INFO);            # Close the file

open(INFO1, "$file");        # Open the file
@lines = <INFO1>;        # Read it into an array
close(INFO1);            # Close the file
print @lines;            # Print the array

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And This is the output. the file isn't modifying. 
D:\Perl_Samples>perl file_Modify.pl
Alpha
Beta
Chi
Delta
Epsilon

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Please Advise.

In reply to Using $" by Bugz

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