Web Reference: Nov 22, 2010 · 6 In PowerShell, a dollar sign preceding a name indicates a variable. The symbols in question are just special cases of variables provided by the PowerShell environment. They are also known as "automatic" variables. More specifically: $$ is a variable containing the last token of the last line input into the shell (does not contain the whole ... Dec 12, 2008 · I've seen the @ symbol used in PowerShell to initialise arrays. What exactly does the @ symbol denote and where can I read more about it? If you break down powershell to basics then everything is a script block including a script file a, functions and cmdlets. You can define your own parameters but in some occasions one is created by the system for you that represents the input item to process/evaluate. In those situations the automatic variable is $_.
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