Chapter 8
Functions and Libraries
Functions are a very useful feature of any programming language. By defining a specific section of code as a function, that code can be reused in different parts of the script, providing the same functionality for consistency, readability, and maintainability. Often, it is useful to bundle up a set of functions into libraries, providing a set of related functions in one convenient place. This chapter covers various uses of functions, defines what a shell function is (and isn’t), and then covers libraries of functions.
