如果小於Int.max時他不會報錯

    def sumcount(str:String): Int ={

      val ints = for(c <- str)yield {   println(c.asInstanceOf[Int]) ; c.asInstanceOf[Int]}
      println(ints.reduce(_*_))
      println(Int.MaxValue)
      ints.sum
    }

sumcount("Hello")

72
101
108
108
111
825152896
2147483647

  def sumcount(str:String): Long ={

      val ints = for(c <- str)yield {   println(c.asInstanceOf[Long]) ; c.asInstanceOf[Long]}
      println(ints.reduce(_*_))
      println(Int.MaxValue)
      println(Long.MaxValue)
      ints.sum
    }

sumcount("Hello")

scala中計算的的一個小問題,超出Int.maxValue時不會報錯