A function is a program or group of statements that is executed whenever that function name is called in a particular context. A function may be part of an internal program, part of a library, or a separate external program. Functions are an important building block of modular programming because they allow you to construct large programs from a series of small, easily developed modules.
This chapter explains the different types of functions and how they are evaluated. It also provides an alphabetical reference of ARexx's built-in function library.
