Hello again rohan_532,

You are mixing many questions and issues here.

Having a case sensitive string is something different that comparing with a regex with numbers. So take a step backwards and analyze it.

If you have an upper case string and you want to convert it to a lower case you can simply use lc or the opposite assume that you have a lower case string and you want to convert to upper case uc. Or even igf you manage to split the string into pieces and you want to make only the first letter of the string upper case ucfirst.

Regarding the regex part of your question:

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

my @steps_name = ("1-2 Steps", "5-7 Steps", "8-10 Steps", "11-15 Steps
+");

foreach my $element (@steps_name) {
        print "Matched with ".$element."\n" if ($element =~ /[0-9]-[0-
+9]/);
}

__END__

$ perl test.pl
Matched with 1-2 Steps
Matched with 5-7 Steps
Matched with 8-10 Steps
Matched with 11-15 Steps
[download]

As you can see this will match with all elements, so you need to be a bit more specific on what you want to compare against. For example 1-2 Steps only, or multiple choices?

Again I am looking forward to update your question with more details.

Update: Have you read the answers that marinersk and AnomalousMonk have already provided you on your previous question regex for case insensitive? I looks like they have already addressed your problem.

Hope this is more clear now, programming gives you infinite possibilities, you have to tell us exactly what is the desired output.