Programmering 1 Amerikanen i bastun

namespace ConsoleApp2_amerikanen
{
    class Program
    {
        static double fahrenheittoCelsius(double fahr)
        {
            double celsius = ((fahr - 32) * 5) / 9;
            return celsius;
        }
        static void Main(string[] args)
        {
            double celsius, temp, fahr;
            
            Console.WriteLine("Välkommen in i bastun");
            do
            {
                Console.WriteLine("\nPlease enter temperature");
                try
                {
                    fahr = Convert.ToDouble(Console.ReadLine());
                    celsius = fahrenheittoCelsius(fahr);
                    temp = Math.Round(celsius, 1); // deklarerad här
                }
                catch (Exception e)
                {
                    Console.WriteLine("Du kan endast använda siffror!");
                }
                if (temp < 73) // får felmeddelande just för denna del i if satsen, "use of unassigned local variable temp"
                {
                    Console.Write("\nThe temperatur is now {0} celsius it's a bit cold, please turn up the heat", temp);
                }
                else if (temp > 77) // här funkar det
                {
                    Console.WriteLine("\nThe temperatur is now {0} celsius it's a bit to hot, please lower the heat", temp);
                }
                else if (temp == 75) // här funkar det
                {
                    Console.WriteLine("\nThe temperature is now {0} celsius it's perfect, lets sauna!", temp);
                }
                else if (temp > 73 && temp < 77) // här funkar det
                {
                    Console.WriteLine("\nThe temperature is now {0} celsius and that's is fine, lets sauna", temp);
                }

            } while (temp <= 73 || temp >= 77); // här funkar det
            Console.ReadKey();
        }
    }
}