Day 9: Recursion 3 In Java | 30 Days Of Code | Hackerrank Programming Solutions

Hello Programmers/Coders, Today we are going to share solutions of Programming problems of 30 Days Of Code, HackerRank. At Each Problem with Successful submission with all Test Cases Passed, you will get an score or marks. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.

In this post, you will find the solution for Day 9: Recursion 3 in Java-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.

Use “Ctrl+F” To Find Any Questions Answer. & For Mobile User, You Just Need To Click On Three dots In Your Browser & You Will Get A “Find” Option There. Use These Option to Get Any Random Questions Answer.

Link for the ProblemDay 9: Recursion 3– Hacker Rank Solution

Day 9: Recursion 3 – Hacker Rank Solution


Today, we are learning about an algorithmic concept called recursion. Check out the Tutorial tab for learning materials and an instructional video.

Recursive Method for Calculating Factorial

Function Description
Complete the factorial function in the editor below. Be sure to use recursion.

factorial has the following paramter:

  • int n: an integer


  • int: the factorial of 

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

Input Format

A single integer,  (the argument to pass to factorial).


  • Your submission must contain a recursive function named factorial.

Sample Input


Sample Output



Consider the following steps. After the recursive calls from step 1 to 3, results are accumulated from step 3 to 1.

Day 9: Recursion 3 – Hacker Rank Solution
import java.util.Scanner;

 * @author Techno-RJ
public class Day9Recursion {
	public static int factorial(int i) {
		if (i == 1 || i == 0) {
			return 1;
		} else {
			return i * factorial(i - 1);

	public static void main(String[] args) {
		Scanner sc = new Scanner(;
		int i = sc.nextInt();

Leave a Comment

Ads Blocker Image Powered by Code Help Pro

Ads Blocker Detected!!!

We have detected that you are using extensions to block ads. Please support us by disabling these ads blocker🙏.

Powered By
Best Wordpress Adblock Detecting Plugin | CHP Adblock