Regex: Difference between revisions

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| Metacharacters Defined || Metacharacter Examples

| (...) || Logical grouping of part of an expression. (abc){2} abcabc

| * || 0 or more of previous expression. ab*c ac, abc, abbc, abbbc, ...

| + || 1 or more of previous expression. ab+c abc, abbc, abbbc, ...

| ? || 0 or 1 of previous expression; also forces minimal matching when an expression might match several strings within a search string. ab?c ac, abc

| \ || Preceding one of the above, it makes it a literal instead of a special character. Preceding a special matching character, see below. a\sc a c

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