PowerShell: Session Environment Variable
💡 TIP: Windows environment variable names are case-insensitive.
What is Session Environment Variable
When PowerShell starts, it loads environment variable from the Windows: Registry, and they became session environment variables.
Change to environment variable in current session is temporary. Once you exit shell, the changes are gone.
Show the Value of a Single Environment Variable
$env:path
Show All Environment Variables
# show all environment variables dir env:
# show env vars whose name contains path dir env:*path*
Set Environment Variable for current session
# sets env var named xx for current session $env:xx = "alice"
# get value of a env var name xx $env:xx
Remove Environment Variable for current session
# remove the env var xx from the current session Remove-Item env:xx