Question

How does the behaviour differ between & powershell .\other.ps1 and & .\other.ps1?

Edit: In particular, how do they differ if there’s an error in other.ps1?

Answer 1

You get another PowerShell process in the former case and the script cannot read variables defined in your current session:

PS> $foo = 'bar'
PS> 'Write-Host $foo'|Set-Content x.ps1
PS> & powershell .\x.ps1

PS> & .\x.ps1
bar