class SmartDevice(val name: String, val category: String) {

    var deviceStatus = "online"

    fun turnOn(){
        println("Smart device is turned on.")
    }

    fun turnOff(){
        println("Smart device is turned off.")
    }
}

fun main() {
    val smartTvDevice = SmartDevice(name = "Android TV", category = "Entertainment")
    println("Device name is: ${smartTvDevice.name}")
    smartTvDevice.turnOn()
    smartTvDevice.turnOff()
}