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    26. Regular Expressions > Quantifiers

    Quantifiers

    Quantifiers match an item a specified number of times.

    Quantifier

    Meaning

    *

    Zero or more matches

    +

    One or more matches

    ?

    Zero or one match

    {n}

    Exactly n matches

    {n,}

    At least n matches

    {n,m}

    Between n and m matches

    The * quantifier matches the preceding character or group zero or more times. The following matches cv.doc, along with any numbered versions of the same file (e.g., cv2.doc, cv15.doc):

    Console.Write (Regex.Match ("cv15.doc", @"cv\d*\.doc").Success);  // True

    Notice that we have to escape out the period in the file extension with a backslash.

    The following allows anything between cv and .doc and is equivalent to dir cv*.doc:

    Console.Write (Regex.Match ("cvjoint.doc", @"cv.*\.doc").Success);  // True

      

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