[c#] 274333번 팩토리얼 2

https://www.acmicpc.net/problem/27433

27433번: 팩토리얼 2

 

<풀이>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace baekjoon27433
{
    internal class FileName
    {
        static void Main(string[] args)
        {
            long n= long.Parse(Console.ReadLine());
            Console.WriteLine(Facto(n));
        }

        public static long Facto(long num)
        {
            if(num == 0) return 1;
            return num*Facto(num - 1);
        }
    }
}