Java_Programs-CodingNinjas/Factorial_of_a_number.java at main · hey-its-d2t2/Java_Programs-CodingNinjas · GitHub

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/*
Write a program to find the factorial of a number.
Factorial of n is:
n! = n * (n-1) * (n-2) * (n-3)....* 1
Output the factorial of 'n'. If it does not exist, output 'Error'.
*/

import java.util.Scanner;


class Solution {


    public static void main(String args[]) {


        // Write code here


        // Adding Scanner Function


        Scanner input = new Scanner(System.in);


        int input_number = input.nextInt();


        // Adding factorial function


        if(input_number < 0){

            System.out.println("Error");

        }else{

            long factorial = 1;

            for( int i = 1; i <= input_number; i++){

                factorial *= i;

            }


            System.out.println(factorial);

        }


    }

}