Dealing with Environment Variables

To read a Windows environment variable in PowerShell, simply use the prefix "env:":

PS> $env:windir
C:\Windows

PS> $env:USERNAME
Tobias

Actually, "env:" is a drive, so you can use it to find all (or some) environment variables. This would list all environment variables that have "user" in its name:

PS> dir env:\*user*

Name                           Value
----                           -----
USERPROFILE                    C:\Users\Tobias
USERNAME                       Tobias
ALLUSERSPROFILE                C:\ProgramData
USERDOMAIN                     TobiasAir1

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