for 循环

如何从1-10循环写下来

object Base25 {
  def main(args: Array[String]): Unit = {
    for(i<-1 to 10){
      println(i)
    }


  }
}

循环步长

• by:步长，循序变里每次增加的值，默认为1
• eg:for(i<-1 to 10)=for(i<-1 to 10 by 1)

object Base25 {
  def main(args: Array[String]): Unit = {
    var sum=0
    for(i<-1 to 100 by 2){
      println(i)
      sum+=i
    }
    println(sum)
  }
}