A.4 Extensions in Brian Kernighan’s awk

Brian Kernighan has made his version available via his home page (see section Other Freely Available awk Implementations).

This section describes common extensions that originally appeared in his version of awk.

• The ‘**’ and ‘**=’ operators (see section Arithmetic Operators and Assignment Expressions).
• The use of func as an abbreviation for function (see section Function Definition Syntax).
• The fflush() built-in function for flushing buffered output (see section Input/Output Functions).

See section Common Extensions Summary, for a full list of the extensions available in his awk.