Day9-Recursion-3

Problem:

Objective
Today, we're learning and practicing an algorithmic concept called Recursion. Check out the Tutorial tab for learning materials and an instructional video!

Recursive Method for Calculating Factorial:

factotial(N) = {1                   N<= 1
                N x factorial(N-1)  otherwise 
                

Task
Write a factorial function that takes a positive integer, N as a parameter and prints the result of N!(N factorial).

Solution:

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {

    // Complete the factorial function below.
    static int factorial(int n) {
                int fact = 1; 
        for(int i=1;i<=n;i++){    
             fact = fact*i;    
          }   
        return fact;
    }

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int n = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

        int result = factorial(n);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedWriter.close();

        scanner.close();
    }
}