Write a Java program to check whether a number is Armstrong number or not

Check whether a number is Armstrong number or not

Sample Output

Check whether a number is Armstrong number or not.

Enter a number: 371
371 is an Armstrong number!

Java-Source Code

//package loopinjava;
 
import java.util.Scanner;
import static java.lang.Math.pow;
 
public class Main {
 
    public static void main(String[] args) {
 
        int i, j, digit, number, numberClone, count = 0, newNumber = 0, temp;
 
        Scanner input = new Scanner(System.in);
 
        System.out.println("Check whether a number is Armstrong number or not.\n");
 
        System.out.print("Enter a number: ");
        number = input.nextInt();
 
        numberClone = number;
        
        while (number != 0) {
            digit = (number % 10);
            number /= 10; /// Or, number = number / 10;
            count++;
        }
 
        number = numberClone;
        while (number != 0) {
            digit = (number % 10);
            temp = (int) pow(digit, count);
            newNumber += temp;
            number /= 10; /// Or, number = number / 10;
        }
 
        number = numberClone;
        
        if (newNumber == number) {
            
            System.out.println(number + " is an Armstrong number!\n\n");
            
        } else {
            
            System.out.println(number + " is not an Armstrong number.\n\n");
        }
    }
}

Sample Output

Check whether a number is Armstrong number or not.

Enter a number: 372
372 is not an Armstrong number.