if ($text =~ /\D/) {print "It's not a number.";} : Digit « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. Digit

if ($text =~ /\D/) {print "It's not a number.";}

    


$text = "Hello!";

if ($text =~ /\D/) {print "It's not a number.";}








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6.if ($text =~ /^\d+$/) {print "It's a number.";}
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11.Matching Any Letter or Number
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