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Complicated awk programs can often be simplified by defining
your own functions. User-defined functions can be called just like
built-in ones (see 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. |