Simple powershell script to ping or do math

simplescript.ps1

Write-Host "Choose between these options:"
Write-Host
Write-Host "1. See a list of processes on the system"
Write-Host "2. See a list of services on the system"
Write-Host "3. Send a ping"
Write-Host "4. Double a number"

$userinput = Read-Host

if ( $userinput -eq "1") {
        Get-Process
} elseif ( $userinput -eq "2" ) {
        Get-Service
} elseif ( $userinput -eq "3" ) {
        $target = Read-Host -prompt "Which user should I ping? "
        ping $target
} elseif ( $userinput -eq "4" ) {
        $num = Read-Host -prompt "Give me a number"
        $updatednum = $num -as [int]
        $updatednum = $updatednum * 2
        Write-Host "Your original number was $num, but now it's $updatednum."
}