How to create and use PowerShell global variable

This PowerShell video tutorial, learn about PowerShell global variable. You can learn:
What is a PowerShell global variable?
How to declare a #PowerShell global variable?
How to use PowerShell global variable inside a function?
How to set a PowerShell global variable from a function?
How to set a PowerShell global variable from a function by passing the global variable as a parameter to the function?
How to use the PowerShell Set-Variable Cmdlets to set value to a PowerShell global variable?
Various PowerShell variable scoping.

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