/de{1,3}f/ matches d, followed by one, two, or three occurrences of e, followed by f. : Pattern matching « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. Pattern matching

/de{1,3}f/ matches d, followed by one, two, or three occurrences of e, followed by f.

    

To specify an exact number of occurrences, include only one value between the { and the }. 

/de{3}f/ specifies exactly three occurrences of e, which means this pattern only matches deeef.








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