動的な環境変数 bat Windows

こんなんgoogleもある

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\username>echo %cd%
C:\Users\username

C:\Users\username>echo %date%
2018/12/10

C:\Users\username>echo %time%
22:36:34.98

C:\Users\username>echo %random%
6451

C:\Users\username>echo %random%
337

C:\Users\username>echo %cmdcmdline%
“C:\Windows\system32\cmd.exe”