循环嵌套

object Base27 {
  def main(args: Array[String]): Unit = {
    var n = 0
    for(i <- 1 to 10 ){
      for(j <- 5 to 20){
        for(k <- 1 to 10){
          n += 1
          println(n, k, i, j)
        }
      }
    }
  }
}

九九乘法表

object Base28 {
  def main(args: Array[String]): Unit = {
   for(i <- 1 to 5){
     for(j <- 1 to i){
       print(i)
     }
     println()
   }
  }
}

object Base29 {
  def main(args: Array[String]): Unit = {
   for(i <- 1 to 9){
     for (j <- 1 to i){
       printf("%d×%d=%-4d",j,i, i*j)
     }

     println()
   }
  }
}

object Base30 {
  def main(args: Array[String]): Unit = {
    var k = 0
    for (gj <- 0 to 100) {
      for (mj <- 0 to 100) {
        var xj = 100 - gj - mj
        if (xj >= 0) {
          if (gj * 5 + mj * 3 + xj / 3 == 100) {
            k += 1

            println(k, gj, mj, xj)

          }
        }
      }
    }
  }
}