Input Format
A single integer,  (the argument to pass to factorial).
Output Format
Print a single integer denoting .
Recursion problem solution - 30 days of code HackerRank

Problem solution in the c programming language.

#include <stdio.h>

int factorial(int n){
    
    return (n == 1) ? 1 : n * factorial(n - 1);
    
};

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", factorial(n));
    return 0;
}

Problem solution in C++ programming language.



#include <iostream>

using namespace std;

int factorial(int n) {
    return (n > 1) ? n * factorial(n - 1) : 1;
}

int main() {
    int n;
    cin >> n;
    cout << factorial(n);
    return 0;
}

Problem solution in Java programming language.

public class Solution {

    public static int factorial(int n){
        return (n > 1) ? n * factorial(n - 1) : 1;
    }
    
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        scan.close();
        System.out.println(factorial(n));
    }
}

Problem solution in the python programming language.



import math
import os
import random
import re
import sys

# Complete the factorial function below.
def factorial(n):

    if n == 1:
        return 1
    else:
        n = n * factorial(n-1)
    return n


if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    n = int(input())

    result = factorial(n)

    fptr.write(str(result) + '\n')

    fptr.close()