PowerShell equivalent of cmd “IF %ERRORLEVEL% NEQ 0”

Question

Looking for the PowerShell equivalent of this cmd error-check:

IF %ERRORLEVEL% NEQ 0

Here is the PowerShell code I am trying to write:

Answer 1

Since dism.exe is an external program, you'd want to check the $LASTEXITCODE automatic variable:

dism /online /andsoon
if($LASTEXITCODE -ne 0)
{
    # Add your capability
}