Java program to check Armstrong number

Here is a Java program to check the number is Armstrong number or not. An Armstrong number, also known as narcissistic number, is a number that is equal to the sum of the cubes of its own digits.

For example, 153 is an Armstrong number since 153 = 1*1*1 + 7*7*7 + 0*0*0.

Source Code:

//java program to check Armstrong number
import java.util.Scanner;

public class Armstrong {
  public static void main(String args[]) {
    int aNum = 0, r, num, cNum;
    Scanner sc = new Scanner(;
    System.out.print("Enter no. to check:");
    num = sc.nextInt();
    cNum = num;
    do {
      r = cNum % 10;
      cNum = cNum / 10;
      aNum = aNum + r*r*r;
    if(num == aNum) {
      System.out.println("Entered number is Armstrong number.");
    else {
    System.out.println("Entered number is not Armstrong number.");

Input & Output:

Enter no. to check:22
Entered number is not Armstrong number.


Enter no. to check:153
Entered number is Armstrong number.

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