powershell - Remove all variables

Question

I want to remove all user-created variables at the start of a script.

Currently I am doing Remove-Variable -Name * but it tries to dele

Answer 1

I would pull the list of existing variable names into an array at the beginning of the script, then remove any newly added variables at the end of the script:

### Start of script (store list of existing variable names)
$ExistingVariables = Get-Variable | Select-Object -ExpandProperty Name

<#
Script contents go here
#>

### End of script (remove new variables)
$NewVariables = Get-Variable | Select-Object -ExpandProperty Name | Where-Object {$ExistingVariables -notcontains $_ -and $_ -ne "ExistingVariables"}
if ($NewVariables)
    {
    Write-Host "Removing the following variables:`n`n$NewVariables"
    Remove-Variable $NewVariables
    }
else
    {
    Write-Host "No new variables to remove!"
    }