Chapter 4. Creating and Calling Subroutines
This chapter shows how to create and call subroutines in a script.
The topics covered in this chapter are as follows:
Show some simple subroutines.
Show more advanced routines.
Mention return codes again and how they work in scripts.
In the previous chapters we have seen mostly simple scripts that were not very complicated. Scripts can actually do a whole lot more which we are about to see.
First, let's start with a selection of simple but powerful scripts. These are mainly shown to give the reader an idea of just what can be done quickly with a script.
