fun sum(a: Int, b: Int): Int {
  return a + b
}

fun printSum(a: Int, b: Int): Unit {
  println("sum of $a and $b is ${a + b}")
}

fun main(args: Array<String>) {
  printSum(-1, 8)
}

//sampleStart
fun sum(a: Int, b: Int): Int {
  return a + b
}

fun printSum(a: Int, b: Int): Unit {
  println("sum of $a and $b is ${a + b}")
}
//sampleEnd

fun main(args: Array<String>) {
  printSum(-1, 8)
}