09. Fruit or Vegetable

Решение със switch:

using System;

namespace FruitOrVegetable
{
    class Program
    {
        static void Main(string[] args)
        {
            string product = Console.ReadLine();
            switch (product)
            {
                case "banana":
                case "apple":
                case "kiwi":
                case "cherry":
                case "lemon":
                case "grapes":
                    Console.WriteLine("fruit");
                    break;
                case "tomato":
                case "cucumber":
                case "pepper":
                case "carrot":
                    Console.WriteLine("vegetable");
                    break;
                default:
                    Console.WriteLine("unknown");
                    break;
            }
        }
    }
}

Решение с if-else:

using System;

namespace FruitOrVegetable
{
    class Program
    {
        static void Main(string[] args)
        {
            string product = Console.ReadLine();

            if (product == "banana" || product == "apple" || product == "kiwi" || product == "cherry" || product == "lemon" || product == "grapes")
            {
                Console.WriteLine("fruit");
            }
            else if (product == "tomato" || product == "cucumber" || product == "pepper" || product == "carrot")
            {
                Console.WriteLine("vegetable");
            }
            else
            {
                Console.WriteLine("unknown");
            }
        }
    }
}

Решение с тернарен оператор:

using System;

namespace FruitOrVegetable
{
    class Program
    {
        static void Main(string[] args)
        {
            string product = Console.ReadLine();

            Console.WriteLine( product == "banana" || product == "apple" || product == "kiwi"|| product == "cherry" || product == "lemon" || product == "grapes" ? "fruit" : product == "tomato" || product == "cucumber" || product == "pepper" || product == "carrot" ? "vegetable" : "unknown");

        }
    }
}