fun main(args: Array<String>) {
  val numbers = listOf(1,2,3,4,5)
  for (index in numbers.indices)
    print("$index index value is ${numbers[index]}\n")
    //0 index value is 1
    //1 index value is 2
    //2 index value is 3
    //3 index value is 4
    //4 index value is 5
}