C# Value unitialized

I have a problem that I have been trying to sort out for quite a while now but I just can't wrap my head around it. I have two double variables that are initialized. Obviously, I get an error for that because they should have a value. However, the only value I could set it to is 0. The issue with that is, if I set the value to 0, my program does not run correctly and the output of my program becomes 0 too.

Error: Local variable 'userSalary' might not be initialized before accessing

I am still kind of learning the ways of methods, parameters, and arguments.

class Program  {      static void Main(string[] args)      {          double userSalary;          double leftOver;          AskQuestion(userSalary);          CalculateTax(userSalary, leftOver);      }            static void AskQuestion(double userSalary)      {          Console.WriteLine("What is annual your salary?");          userSalary = Convert.ToDouble(Console.ReadLine());        }        static void CalculateTax(double userSalary, double leftOver)      {          if (userSalary <= 14_000) //10%          {              Console.WriteLine("You are in Tax Category 1. 10% of your Salary goes to the state!");              Console.WriteLine("Calculating Salary...");              Thread.Sleep(500);              leftOver = userSalary - (userSalary * 10 / 100);              Console.WriteLine("Your Salary after taxation is: $" + leftOver);          }      }    }  

https://stackoverflow.com/questions/65589973/c-sharp-value-unitialized January 06, 2021 at 11:54AM