Scala的to和until

object test03 {
  def main(args: Array[String]): Unit = {
    //to  每次迭代为1
    val to1= to
    print("to1"+to1)
    println()

    //to by 自定义迭代的大小
    val to2= to  by
    print("to2"+to2)
    println()
    //Range:until  (包前不包后,每次迭代为1)
    val until1= until
    print("until1"+until1)
    println()
    //Range:until  by (自定义迭代)
    val until2= until  by
    print("until2"+until2)
  }
}