24

scala

object w18 {
  def main(args: Array[String]): Unit = {
    var i = 0
    for(i <- 1 to 5) {
      for (j <- 1 to i) {

        print(i)
      }

      println()
    }
  }
}

scala

object w19 {
  def main(args: Array[String]): Unit = {
    var i = 0
    for(i <- 1 to 9) {
      for (j <- 1 to i) {

        print(s"$j×$i=${i * j}\t")
        printf("%d*%d=%-4d",j,i,i*j)
      }

      println()
    }
  }
}