运行

object sss03 {
  def main(args: Array[String]): Unit = {
    var i = 1
    while(i <= 100){
     println(i)
     i =i+2
  }
 }
}

object sss04 {
  def main(args: Array[String]): Unit = {
    var sum = 0
    var i = 0
    while(i<=100){
      sum = sum + i
      i += 1
  }
    println(sum)
 }
}

object sss05 {
  def main(args: Array[String]): Unit = {
    while(true){
      print("请输入一个年份：")
      val year = scala.io.StdIn.readInt()
      if(year%400==0 || (year%4==0 && year%100!=0)){
        println(s"$year 是一个闰年")
      }else{
        println(s"$year 不是一个闰年")
      }
    }
 }
}