In PowerShell, how do I define a function in a file and call it from the PowerShell commandline?

Question

I have a .ps1 file in which I want to define custom functions.

Imagine the file is called MyFunctions.ps1, and the content is as follows:

Write-Host          


        

Answer 1

. "$PSScriptRoot\MyFunctions.ps1" MyA1Func

Availalbe starting in v3, before that see How can I get the file system location of a PowerShell script?. It is VERY common.

P.S. I don't subscribe to the 'everything is a module' rule. My scripts are used by other developers out of GIT, so I don't like to put stuff in specific a place or modify system environment variables before my script will run. It's just a script (or two, or three).