Scala print between 1 and 100 is the sum of the number of multiples of 9

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object Demo17 {
  def main(args: Array[String]): Unit = {
    var res = for (i <- 1 to 100 if i % 9 == 0) yield {
      i
    }

    var sum:Int = 0
    for (i<- res){
      sum += i
    }

    println("运算结果："+res.length)
    println("运算结果："+sum)
  }
}