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(gawk.info)User-defined

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User-Defined Functions
======================

   Complicated `awk' programs can often be simplified by defining your
own functions.  User-defined functions can be called just like built-in
ones (Note: Function Calls), but it is up to you to define them;
i.e., to tell `awk' what they should do.

Definition Syntax

How to write definitions and what they mean.

Function Example

An example function definition and what it

does.

Function Caveats

Things to watch out for.

Return Statement

Specifying the value a function returns.

Dynamic Typing

How variable types can change at runtime.