++ nice.
if ($answer !~ /\d+/) {
I think the following code better represents your intent: 
    if ($answer =~ /\D/) {

[download]

You only want someone to enter a positive integer. You don't want someone entering a number with letters or other characters in it, such as '123g'. This string slips through your regex test, then generates unnecessary warnings.

In reply to Re: Guess That Number by toolic
in thread Guess That Number by naildownx

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