If $number !=~ /[0-9][0-9][0-9][0-9]/{

If you want a negation you sould use !~ as operator instead of =~ or unless instead of if as condition. The regex matches 4 digits anywhere in $number. Correct use of possible regexe's is explained above.

In reply to Re: Re: compare stdin for a number by neniro
in thread compare stdin for a number by anoxer

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