Java Programs - Solved 2011 ICSE Computer Science Paper

Share with a Friend

Solved 2011 ICSE Computer Science Paper

Class 10 - ICSE Computer Science Solved Papers

Special Number Program - ICSE 2011 Computer Science

Write a program to input a number and print whether the number is a special number or not.
(A number is said to be a special number, if the sum of the factorial of the digits of the number is same as the original number).
Example: 145 is a special number, because 1! + 4! + 5! = 1 + 24 + 120 = 145.
(Where ! stands for factorial of the number and the factorial value of a number is the product of all integers from 1 to that number, example 5! = 1 * 2 * 3 * 4 * 5 = 120)

import java.util.Scanner;
class Special{
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the number: ");
        int n = Integer.parseInt(in.nextLine());
        int sum = 0;
        for(int i = n; i != 0; i /= 10)
            sum += factorial(i % 10);
        if(n == sum)
            System.out.println("Special number!");
        else
            System.out.println("Not a special number.");
    }
    public static int factorial(int n){
        int f = 1;
        for(int i = 1; i <= n; i++)
            f *= i;
        return f;
    }
}
 

 
 OUTPUT : 
Enter the number: 145
Special number!