23. ERR-05 Avoid testing for a null variable as an error condition

Also try to avoid testing for a null variable as an error condition:

````

$user = Get-ADUser -Identity DonJ

if ($user) {

$user | Do-Something}

Else [

Write-Warning “Could not get user $user”

}````

There are times and technologies where that’s the only approach that will work, especially if the command you’re running won’t produce a terminating, trappable exception. But it’s a logically contorted approach, and it can make debugging trickier.