File: gawk.info,  Node: Functions,  Next: Library Functions,  Prev: Arrays,  Up: Top

9 Functions
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This major node describes 'awk''s built-in functions, which fall into
three categories: numeric, string, and I/O. 'gawk' provides additional
groups of functions to work with values that represent time, do bit
manipulation, sort arrays, provide type information, and
internationalize and localize programs.

   Besides the built-in functions, 'awk' has provisions for writing new
functions that the rest of a program can use.  The second half of this
major node describes these "user-defined" functions.  Finally, we
explore indirect function calls, a 'gawk'-specific extension that lets
you determine at runtime what function is to be called.

* Menu:

* Built-in::                    Summarizes the built-in functions.
* User-defined::                Describes User-defined functions in detail.
* Indirect Calls::              Choosing the function to call at runtime.
* Functions Summary::           Summary of functions.