Most likely your course material contains the information relevant to solving this task.

How would you go about reversing only the numbers in a string, if you had to do it manually, without a computer?

Here's a solution for one interpretation of your question:

#!/usr/bin/perl
use strict;
use warnings;
(my $string = shift()) =~ s/(\d+)/reverse $1/ge;
print "$string\n";
[download]

Save as foo.pl and then call it as

to get output like

You seem to have been around here for a few years so it's less likely that this is a homework question. If that is the case then perhaps you need to tell us a little more about what you actually need to do? We can generally provide better answers if you give us more information, and especially if you show us what you have tried already. But then, you should already know that.

You may find that reverse is a key to solving your problem however.

You seem to have been around here for a few years so it's less likely that this is a homework question

Its homework all right, crowd-sourcing isn't the point Stop with the interview questions already

Guys, it is not homework...

I'm not using Perl extensively and therefore I'm not aware of all the options. All I wanted is a little help... No need to make a fuss.

perlpie, many thanks for your answer. I did not know the '/e' operator.

$string = 'abcdef12345ghijklm6789nop';
$string=~s/(\d+)/reverse $1/ge;
[download]

Thanks!