Factorial!

Problem

You have been given a positive integer $N$. You need to find and print the Factorial of this number. The Factorial of a positive integer $N$ refers to the product of all number in the range from $1$ to $N$. You can read more about the factorial of a number here.

Input Format:
The first and only line of the input contains a single integer $N$ denoting the number whose factorial you need to find.

Output Format
Output a single line denoting the factorial of the number $N$.

Sample Input

2

Sample Output

2

Link to problem

Solution

All one needs to do here is to find the product of all the number in the range from $1$ to $N$. This can be done by iterating over the entire range from $1$ to $N$.

import java.io.*;

import java.util.*;

class example_2

{

    static Scanner sc=new Scanner(System.in);

    public static void main(String args[]) throws Exception

    {

        long n=sc.nextLong(),prod=1;

        for(long i=1;i<=n;i++)

        {

            prod=prod*i;

        }

        System.out.println(prod);

    }

}