Hello, I'm tasked with taking an input.txt file that contains in various lines, the word 'new'. I need to create an output.txt file that switches all instances of 'new' regardless of case, to 'old'. I've opened my input.txt file, opened my output.txt file, and have a Regex to make the correct switches, but how do I get it to write to my output.txt file? Any help is appreciated!

use strict;
use warnings;

open(my $in, "<", "input.txt")
    or die "Cannot open < input.txt: $!";

open(my $out, ">", "output.txt")
    or die "Cannot open < output.txt: $!";

while(my $line = <$in>) {
    $line =~ s/new/old/i;
}

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In reply to [Class Assignment] Regex and Output Files by Hayest

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