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Regex

3.4 Repetition Operators

Repetition operators repeat the preceding regular expression a specified number of times.

3.4.1 The Match-zero-or-more Operator (*)		*
3.4.2 The Match-one-or-more Operator (+ or \+)		+
3.4.3 The Match-zero-or-one Operator (? or \?)		?
3.4.4 Interval Operators ({ ... } or \{ ... \})		{}