Windows PowerShell Quick Reference

PowerShell Automatic Variables

Windows PowerShell Automatic Variables
Variables automatically used and set by Windows PowerShell
Variable	Meaning
$$	Last token of the last line received by the shell.
$?	Success/fail status of the last operation.
$^	First token of the last line received by the shell.
$_	Current pipeline object in a pipelined script block.
$args	Array of parameters passed to the script, function, or scriptblock.
$confirmPreference	Preference that controls the level of impact that operations may have before requesting confirmation. Supports the values low, medium, high. A value of none disables confirmation messages.
$consoleFilename	Filename of the PowerShell console file that configured this session.
$currentlyExecutingCommand	Currently executing command, when in a suspended prompt.
$debugPreference	Preference that controls how PowerShell should handle debug output written by a script or cmdlet. Supports the values SilentlyContinue, Continue, Inquire, and Stop.
$error	Array that holds the (terminating and non-terminating) errors generated in the shell.
$errorActionPreference	Preference that controls how PowerShell should handle error output written by a script or cmdlet.
	Supports the values SilentlyContinue, Continue, Inquire, and Stop.
$errorView	Preference that controls how PowerShell should output errors in the shell. Supports the values of Normal, and CategoryView (a more succinct and categorical view of the error.)
$executionContext	Means by which scripts can access the APIs typically used ...