Source code in the scala programming language

  {
    var (x, l) = (0, List[Int]())
    do {
      x += 1
      l :+= x // A new copy of this list with List(x) appended.
    } while (x % 6 != 0)
    l
  }.foreach(println(_))

	def loop(iter: Int, cond: (Int) => Boolean, accu: List[Int]): List[Int] = {
	  val succ = iter + 1
	  val temp = accu :+ succ
	  if (cond(succ)) loop(succ, cond, temp) else temp
	}
	println(loop(0, (_ % 6 != 0), Nil))

  def loop(i: Int, cond: (Int) => Boolean): Stream[Int] = {
    val succ = i + 1;
    succ #:: (if (cond(succ)) loop(succ, cond) else Stream.empty)
  }
  loop(0, (_ % 6 != 0)).foreach(println(_))