The scripts created in the previous chapter flow only in a single directionforward. That is, the same statements are executed in the same order every time a script is run. This does not allow for much flexibility, as any sort of dynamic programming will at the very least need to have a loop or two, not to mention the ability to check for the validity of certain conditions before proceeding onward.
You will now learn about the programming structures that enable your scripts to adapt to circumstances. In this chapter, you will learn