From Get docs

Next: Variables, Previous: Constants, Up: Values   [Contents][Index]

6.1.2 Using Regular Expression Constants

Regular expression constants consist of text describing a regular expression enclosed in slashes (such as /the +answer/). This section describes how such constants work in POSIX awk and gawk, and then goes on to describe strongly typed regexp constants, which are a gawk extension.

Standard Regexp Constants    Regexp constants in standard awk.
Strong Regexp Constants    Strongly typed regexp constants.