Regular expression pattern quantifiers : Pattern matching « Regular Expression « Perl

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Perl » Regular Expression » Pattern matching

Regular expression pattern quantifiers


    



QUANTIFIER             PURPOSE





*                      Matches 0 or more times.



+                      Matches 1 or more times.



?                      Matches 0 or 1 times.



{n}                    Matches exactly n times.



{n,}                   Matches at least n times.



{n,m}                  Matches at least n times but no more than m times.

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23.	Check for no 'a'
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25.	A program that illustrates the use of the matching operator.
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