Windows environment variables

useful environment variables for Windows

Environment Variable Example Value
%ProgramFiles% C:\Program Files
%ProgramFiles(x86)% C:\Program Files (x86)
%AppData% C:\Users\<Username>\AppData\Roaming
%UserProfile% C:\Users\<Username>
%LocalAppData% C:\Users\<Username>\AppData\Local
%SystemRoot% C:\Windows
import os
program_files = os.environ['ProgramFiles']