Day9:Recursion3.java

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

public class Solution {

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        System.out.println(factorial(n));
    }
    
    public static int factorial(int num){
        if(num<=1)
            return 1;
        return num*factorial(num-1);
    }
}