scalaobject scala2 { def main(args: Array[String]): Unit = {

object scala1 {
  def main(args: Array[String]): Unit = {
    for (j <- 1 to 20; if(j%2==0);if(j%3==0)){
      println(j)
    }
  }
}

object scala2 { def main(args: Array[String]): Unit = { var rs = for (i <- 1 to 4 ) yield{ i*2 } println(rs) println(rs(0)) println(rs(1)) println(rs(2)) } }


object scala3 {
  def main(args: Array[String]): Unit = {
    for(i <- 1 to 100){
      printf("%4d", i)
      if(i % 5 ==0){
        println()
      }
    }
  }
}