if ($text =~ /^[+-]\d+\.\d*$/) {print "It's a number.";} : Digit « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. Digit

if ($text =~ /^[+-]\d+\.\d*$/) {print "It's a number.";}

    

$text = "-3.1415";
if ($text =~ /^[+-]\d+\.\d*$/) {print "It's a number.";}








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