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

namespace ConsoleIfElse2
{
    class Program
    {
        static void Main(string[] args)
        {
            int age;
            Console.Write("請輸入年齡 : ");
            age = int.Parse(Console.ReadLine());
            if (age < 10 || age > 19)
                Console.WriteLine("你的年齡是 {0} , 不是青少年", age);
            else
                Console.WriteLine("你的年齡是 {0} , 是青少年", age);
            Console.Read();
        }
    }
}