function temp($k){
    try{
        $c = $k - 273.15
        $r = $k / 5 * 9
        $f = $r - 459.67
    } catch {
        Write-host "Input error."
        return
    }

    Write-host ""
    Write-host "    TEMP (Kelvin)    : " $k
    Write-host "    TEMP (Celsius)   : " $c
    Write-host "    TEMP (Fahrenheit): " $f
    Write-host "    TEMP (Rankine)   : " $r
    Write-host ""

}

$input=Read-host "Enter a temperature in Kelvin"
temp $input