Write a program to find the given number is Armstrong number or not?

Description:

Armstrong numbers are the sum of their own digits to the power of the number of digits. It is also known as narcissistic numbers.

Code:

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 package com.govindsblog.algos;   public class MyArmstrongNumber {       public boolean isArmstrongNumber(int number){                   int tmp = number;         int noOfDigits = String.valueOf(number).length();         int sum = 0;         int div = 0;         while(tmp > 0)         {             div = tmp % 10;             int temp = 1;             for(int i=0;i<noOfDigits;i++){                 temp *= div;             }             sum += temp;             tmp = tmp/10;         }         if(number == sum) {             return true;         } else {             return false;         }     }           public static void main(String a[]){         MyArmstrongNumber man = new MyArmstrongNumber();         System.out.println("Is 371 Armstrong number? "+man.isArmstrongNumber(371));         System.out.println("Is 523 Armstrong number? "+man.isArmstrongNumber(523));         System.out.println("Is 153 Armstrong number? "+man.isArmstrongNumber(153));     } }

Output:

Is 371 Armstrong number? true Is 523 Armstrong number? false Is 153 Armstrong number? true