백준 10872번 - 팩토리얼 (Java 8)

https://www.acmicpc.net/problem/10872

10872번: 팩토리얼

 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static int factorial(int n){
        if(n <= 1){
            return 1;
        }
        return n * factorial(n-1);
    }
    
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int n = Integer.parseInt(br.readLine());
        int sum = factorial(n);
        System.out.println(factorial(n));
    }
}