Another kind of container

Scripts are a simple way to reuse your commands. Scripts are file-based, so there is an inherent limitation—you can only have one script per file. This may not seem like a problem, but when you have hundreds or even thousands of pieces of code, you may want to be able to group them together and not have so many files on the disk.

Comparing scripts and functions

The primary difference between a function and a script is that a script is a file, whereas a function is contained within a file. Consider the MdAndGo.ps1 script from Chapter 6, Scripts:

As a function, this could be written like this:

You can see from this example that the functions are defined using the function keyword. Comparing these two examples, you can also see that the body of the function (the scriptblock after the function name) is identical to the contents of the script. Practically speaking, anything you can do in a script, you can do in a function also. If this is true (it is true), why would we...