1 1 6.1.1.3 Regular Expression Constants 1 .................................... 1 1 A "regexp constant" is a regular expression description enclosed in 1 slashes, such as '/^beginning and end$/'. Most regexps used in 'awk' 1 programs are constant, but the '~' and '!~' matching operators can also 1 match computed or dynamic regexps (which are typically just ordinary 1 strings or variables that contain a regexp, but could be more complex 1 expressions). 1