Match zero or one characters : Frequency « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. Frequency

Match zero or one characters

   

$p = "This is a pattern test.";

if ($p =~ /(\w)?/){ print "$1\n"; }








Related examples in the same category

1.Check the frequency
2.To specify a maximum number of occurrences, use 0 as the lower bound.
3.To specify a minimum number of occurrences, leave off the upper bound.
4.Checking for multiple occurrences