Attempt at advanced function

function test{
    param(
        [string[]]$ComputerName = 'localhost'
    )

    begin{

    }

    process{
    ForEach ($Computer in $ComputerName){

        $test = Get-Process -name explorer -ComputerName $Computer | Select-Object -Property id
        switch ($test)
            {
                300 {$test = "The answer is 300"}
                5096 {$test = "the answer is 5096"}
                321 {$test = "the answer is 321"}
                default {"The answer is none"}
            }
        }
    }

    end{

    Write-Host ("answer = $test")

    }
}

test