Design a class ArmNum to check if a given number is an Armstrong number or not.
[A number is said to be Armstrong if sum of its digits raised to the power of length of the number is equal to the number]
Example : 371 = 33 + 73 + 13
1634 = 14 + 64 + 34 + 44
54748 = 55 + 45 + 75 + 45 + 85
Thus 371, 1634 and 54748 are all examples of Armstrong numbers.

Some of the members of the class are given below:
Class name:ArmNum

Data members/instance variables:
n:to store the number
l:to store the length of the number

Methods/Member functions:

ArmNum (int nn):parameterized constructor to initialize the data member n=nn

int sum_pow(int i):returns the sum of each digit raised to the power of the length of the number using recursive technique
eg. 34 will return 32 + 42 (as the length of the number is 2)

void isArmstrong( ):checks whether the given number is an Armstrong number by invoking the function sum_pow() and displays the result with an appropriate message

Specify the class ArmNum giving details of the constructor( ), int sum_pow(int) and void isArmstrong( ). Define a main( ) function to create an object and call the functions accordingly to enable the task

Share code with your friends

Share on whatsapp
Share on facebook
Share on twitter
Share on telegram


					import java.util.Scanner;
public class ArmNum
    int n,l;

    ArmNum(int nn)

    int sum_pow(int i)
            return 0;
            return (int)Math.pow(i%10,l) + sum_pow(i/10);

    void isArmstrong()
            System.out.println(n + " is an Armstrong number");
            System.out.println(n + "is not an Armstrong number");
    public static void main()
        Scanner sc=new Scanner(System.in); 
        System.out.println("ENTER THE NUMBER");
        int num=sc.nextInt();
        ArmNum ob1=new ArmNum(num);


Coding Store

Leave a Reply

Your email address will not be published. Required fields are marked *