Automatic Variables
suggest changeIntroduction
Automatic Variables are created and maintained by Windows PowerShell. One has the ability to call a variable just about any name in the book; The only exceptions to this are the variables that are already being managed by PowerShell. These variables, without a doubt, will be the most repetitious objects you use in PowerShell next to functions (like $? - indicates Success/ Failure status of the last operation)
Syntax
$$
- Contains the last token in the last line received by the session.$^
- Contains the first token in the last line received by the session.$?
- Contains the execution status of the last operation.$_
- Contains the current object in the pipeline
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