Question

How to check if a number is armstrong number or not in Scala

Answer 1

// An Armstrong number of three digits is an integer that the sum
// of the cubes of its digits is equal to the number itself

// 371 is an Armstrong number: 3**3 + 7**3 + 1**3 = 371

object IsArmstrongNumber_Scala {

  def isArmstrongNumber(n: Int): Boolean = {
    var reminder = 0
    var sum = 0
    var tmp = n

    var number = n
    while (number != 0) {
      reminder = number % 10
      number = number / 10
      sum += reminder * reminder * reminder
    }

    sum == tmp
  }

  def main(args: Array[String]): Unit = {
    val n = 371

    if (isArmstrongNumber(n))
      println(s"$n is an Armstrong number")
    else
      println(s"$n is not an Armstrong number")
  }
}



/*
run:

371 is an Armstrong number

*/

 

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