The functions we are using here are called "basic" PowerShell functions. If you haven't already built advanced PowerShell functions yet, I encourage you to learn as they include much more ...

If you're not building advanced functions today, I highly encourage you check them out. You can learn more with my Pluralsight course entitled Building Advanced PowerShell Functions and Modules.

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.