using System;

​

​

public class comprobador

{

    string[] ciudad = { "9", "19", "29","39","49" };

    int x;

​

    Console.WriteLine("Escriba un numero");

    int x= Convert.ToInt16(Console.ReadLine());

​

    if (x == true)

    {

        Console.WriteLine("Existe");

    }

    else

    {

        Console.WriteLine("No existe");

    }

​

}