HackerRank- Java Solutions

Java Day 9: Recursion 3

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

Note: If you fail to use recursion or fail to name your recursive function factorial or Factorial, you will get a score of 0.

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 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        in.close();
        System.out.println(factorial(n));
    }

    private static int factorial(int n) {
        if (n == 1) return 1;
        return factorial(n - 1) * n;
    }
}