JavaAlgorithms/Others/Armstrong.java

package Others;

import java.util.Scanner;

/**
 * A utility to check if a given number is armstrong or not. Armstrong number is
 * a number that is equal to the sum of cubes of its digits for example 0, 1,
 * 153, 370, 371, 407 etc. For example 153 = 1^3 + 5^3 +3^3
 *
 * @author mani manasa mylavarapu
 */
public class Armstrong {
    static Scanner scan;

    public static void main(String[] args) {
        scan = new Scanner(System.in);
        int n = inputInt("please enter the number");
        boolean isArmstrong = checkIfANumberIsAmstrongOrNot(n);
        if (isArmstrong) {
            System.out.println("the number is armstrong");
        } else {
            System.out.println("the number is not armstrong");
        }
    }

    /**
     * Checks whether a given number is an armstrong number or not. Armstrong
     * number is a number that is equal to the sum of cubes of its digits for
     * example 0, 1, 153, 370, 371, 407 etc.
     *
     * @param number
     * @return boolean
     */
    public static boolean checkIfANumberIsAmstrongOrNot(int number) {
        int remainder, sum = 0, temp = 0;
        temp = number;
        while (number > 0) {
            remainder = number % 10;
            sum = sum + (remainder * remainder * remainder);
            number = number / 10;
        }
        if (sum == temp) {
            return true;
        } else {
            return false;
        }
    }

    private static int inputInt(String string) {
        System.out.print(string);
        return Integer.parseInt(scan.nextLine());
    }
}