PowerShell method of obtaining environment variable _powershell

To get a Windows environment variable in PowerShell, the simple thing is to use the "env:" prefix:

Copy Code code as follows:

Ps> $env: windir
C:\Windows

Ps> $env: USERNAME
Tobias

In fact, "env:" is a driver, so you can query most or part of the environment variables. The environment variables that contain the user in all names are shown below:

Copy Code code as follows:

ps> dir env:\*user*

Name Value
----                           -----
UserProfile C:\Users\Tobias
USERNAME Tobias
AllUsersProfile C:\ProgramData
UserDomain TobiasAir1