Extension

fun main(args : Array<String>){
    //10.printInt()
    //println(10.plusThree())
    println(10.slice)
}

//extension Int
fun Int.printInt(){
    print("value $this")
}

//return value
fun Int.plusThree(): Int{
    return this + 3
}

//extension properties
val Int.slice : Int
get() = this / 2