Powershell error handling: do something if NO error occured

What about,

something
If ($?)
{
    "No error"
}
Else
{
    "Error"
}

This will work for non terminating errors too.

Another way:

$ErrorOccured = $false

try 
{ 
   $ErrorActionPreference = 'Stop'
   ...something...
}
catch
{
   "Error occured"
   $ErrorOccured=$true
}

if(!$ErrorOccured) {"No Error Occured"}

.

Check the automatic-variable $error after you cleared it.

$error.clear()
try { something }
catch { "Error occured" }
if (!$error) { "No Error Occured" }