Strong Number – SchoolCodeHub

Strong Number is a number whose sum of factorial of it’s digits is equal to the original number.

Example 1: 145. 1!+4!+5! = 1+24+120 = 145. Hence it is a Strong Number.

Example 2: 122. 1!+3!+4! = 1+6+24 = 31. Hence it is not a Strong Number.

Java

import java.util.*;
public class StrongNumber
{
    public static void main(String args[])
    {
        int n=0,r=0,f=0,sum=0,nCopy=0;
        Scanner sc=new Scanner(System.in);
        System.out.print("Enter a number: ");
        n=sc.nextInt();
        nCopy=n;
        while(n>0)
        {
            f=1;
            r=n%10;
            for(int i=1;i<=r;i++)
            {
                f=f*i;
            }
            sum=sum+f;
            n=n/10;
        }
        if(sum==nCopy)
        {
            System.out.println(nCopy+" is a Strong Number");
        }
        else
        {
            System.out.println(nCopy+" is not a Strong Number");
        }
    }
}

Java