scala

object fwh05 {
  def main(args: Array[String]): Unit = {

    println(2+1)//3
    println(2-1)//1
    println(2*3)//6
    println(5/2)
    println(5%2)




    println(3 == 2)//false
    println(3 != 2)//true
    println(3 > 2)
    println(3 < 2)
    println(3 >= 2)
    println(3 <= 2)
  }

}

输出结果

object fwh06 {
  def main(args: Array[String]): Unit = {
    println(2>1)
    var a = 2 > 1 //true

    println(  !a) //false
    println(  !(2>1)  ) //false
  }

}

输出结果

object fwh07 {
  def main(args: Array[String]): Unit = {
    println("请输入年份：")
    var year = scala.io.StdIn.readInt()
    var set =(year%4==0 && (year%100!=0) || (year%400==0))

      if(set) {
        println("闰年")
      }else{
        println("不是闰年")
      }
  }

}