I don't see a reason to invoke the regex compiler for every match. 

if ( m/^(\d+)(?(?{ $^N < $min || $^N > $max })(?!))$/ ){
   print "$_ is between $min and $max\n";
}

[download]

$^N was introduced in 5.8. Using $1 would provide backwards compatibility if required.

In reply to Re^2: Match range of number by ikegami
in thread Match range of number by johntio

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