Also known as regular expression or regexp, a description of a set of strings, often used for searching and validating strings.

A regex, also known as a regular expression or regexp, is a description of a set of strings with certain properties. For example, \d{5} matches a series of 5 digits, such as 43822.

Use this tag when on the hunt for scripting syntax (in , , , , , etc.) which will match a given set of text.

Because regular expressions are not fully standardized, all questions with this tag should also include a tag specifying the applicable programming language or tool.