If your automated script takes action based on a value, it's critical to make sure the value is correct. Good thing PowerShell has ways to validate the values that are passed to a function.

Basic PowerShell functions Basic PowerShell functions are straightforward and lack advanced features. They are declared using the function keyword, followed by a set of curly braces: function ...

If you are building PowerShell longer than a few lines, it is good practice to break up your code into reusable snippets. This way you can only call the code snippet over and over instead of ...

How To Validate Input in PowerShell Functions, Part 2 As Brien demonstrates, string validation is not the only type of input validation that PowerShell can perform.