for

object xunhuan {
  def main(args: Array[String]): Unit = {
    //1.范围遍历
    for (i <- 1 to 10)
      println(i  + ": hello world")
    for (i <- 1.to(10)) {
      println(i + ": hello world")
      println("=======================")
      for (i <- Range(1,10)){
        println(i  + ": hello world")
        println("=====================")
        for (i <- 1 until 10){         //until:直到
          println(i  + ": hello world")

     println("===================")
     //集合遍历
     for (i <- Array(10,34,53)){
       println(i  + ": hello world")
     }
     for (i <- List(10,34,53)){
            println(i  + ": hello world")
          }
     for (i <- Set(10,34,53)){
            println(i  + ": hello world")
          }
        }
      }
    }
  }
}