Vars

Code	Explanation
$a = 0	Initialize a variable
[int] $a = 'Trevor'	Initialize a variable, with the specified type (throws an exception)
[string] $a = 'Trevor'	Initialize a variable, with the specified type (doesn't throw an exception)
Get-Command -Name *varia*	Get a list of commands related to variable management
Get-Variable	Get an array of objects, representing the variables in the current and parent scopes
Get-Variable | ? { $PSItem.Options -contains 'constant' }	Get variables with the "Constant" option set
Get-Variable | ? { $PSItem.Options -contains 'readonly' }	Get variables with the "ReadOnly" option set
New-Variable -Name FirstName -Value Trevor
New-Variable FirstName -Value Trevor -Option Constant	Create a constant variable, that can only be removed by restarting PowerShell
New-Variable FirstName -Value Trevor -Option ReadOnly	Create a variable that can only be removed by specifying the -Force parameter on Remove-Variable
Remove-Variable -Name FirstName	Remove a variable, with the specified name
Remove-Variable -Name FirstName -Force	Remove a variable, with the specified name, that has the "ReadOnly" option set