SpongeBob Random silliness

invoke-spongebob.ps1

function Invoke-Spongebob {
    [cmdletbinding()]
    param(
    [Parameter(HelpMessage = "provide string" , Mandatory = $true)]
    [string]$Message
    )
    $charArray = $Message.ToCharArray()

    foreach ($char in $charArray) {
        $Var = $(Get-Random) % 2
        if ($var -eq 0) {
            $string = $char.ToString()
            $Upper = $string.ToUpper()
            $output = $output + $Upper
        }
        else {
            $lower = $char.ToString()
            $output = $output + $lower
        }
    }
    $output
    $output = $null
}
Invoke-Spongebob -message "What do you mean invoke sarcasm?"