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CHAPTER 23 Operators and Expressions
Users Guide 627
ABB*C Any string containing the pattern ABC or ABBC or ABBBC,
and so on (1 B plus 0 or more Bs).
^AB Any string starting with AB.
AB?C Any string containing the pattern AC or ABC (0 or 1 B).
^[ABC] Any string starting with A, B, or C.
[^ABC] A string containing any characters other than A, B, or C.
^[^abc] A string that begins with any character except a, b, or c.
^[^a-z]$ Any single-character string that is not a lowercase letter (^ and
$ indicate the beginning and end of the string).
[A-Z]+ Any string with one or more uppercase letters.
^[0-9]+$ Any string consisting only of digits.
^[0-9][0-9][0-9]$ Any string consisting of exactly three digits.
^([0-9][0-9][0-9])$ Any string consisting of exactly three digits enclosed in
parentheses.
This pattern Matches
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