scala中to和util操作

  // Range:to:默认步进为1

  val to1 = 1 to 10

  println(to1)

  // 定义一个不进为2的Range

  val to2 = 1 to 10 by 2

  println(to2)

  println(to2.toList)

  // Range:until

  val until1 = 1 until 10

  println(until1)

  val until2 = 1 until 10 by 2

  println(until2)