Greedy match and non-greedy match

Greedy match: Matches the string as long as possible when matching matches, by default, greedy match

String pattern1 = @ "A.*c"; Greedy match regex regex = new Regex (PATTERN1); regex. Match ("Abcabc"); Return "ABCABC"

non-greedy match : matches the shortest possible string, using the? To represent a non-greedy match when the match is met

String pattern1 = @ "A.*?c"; Non-greedy match Regex regex = new Regex (PATTERN1); regex. Match ("Abcabc"); Return "ABC"

Several commonly used non-greedy matching pattern

*? Repeat any number of times, but with as few repetitions as possible +? Repeat 1 or more times, but repeat as little as possible?? Repeat 0 or 1 times, but repeat {n,m} as little as possible. Repeat N to M times, but repeat {n,} as little as possible. Repeat more than n times, but repeat as little as possible

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Greedy match and non-greedy match