Krishnamurthy Number in Java

Question : Write a program to check whether a number is Krishnamurthy number or not?

Krishnamurthy Number : A number whose sum of the factorial of digits is equal to the number itself.

Examples :-

145
1! + 4! + 5! = (1 X 1) + (4 X 3 X 2 X 1) + (5 X 4 X 3 X 2 X 1) = 1 + 24 + 120 = 145

Output : It is a Krishnamurthy Number

55
5! + 5! = (5 X 4 X 3 X 2 X 1) + (5 X 4 X 3 X 2 X 1) = 120 + 120 = 240

Output : It is not a Krishnamurthy Number

Note : To understand the program clearly watch this video : Krishnamurthy Number in Java

Program to check Krishnamurthy Number:-

Program :-

import java.io.*;

import java.util.*;

class Krishnamurthy

{

    public static void main(String args[])

    {

        Scanner in = new Scanner(System.in);

        int n,p,rev,f,i,s=0;

        System.out.println("Enter Number");

        n= in.nextInt();

        p=n;

        while(n>0)

        {

            rev=n%10;

            f=1;

            for(i=rev;i>=1;i--)

            {

                f=f*i;//calculating factorial

            }

            s=s+f;//storing sum of factorial

            n=n/10;

        }

        if(p==s)

        {

            System.out.println("It is a Krishnamurthy Number : "+p);

        }

        else

        {

            System.out.println("It is not a Krishnamurthy Number : "+p);

        }

    }//end of main method

}// end of class

For Proper Understanding Watch the Video :-

Watch this video : Krishnamurthy Number in Java.

All the best :)

Keep Learning :)