How do I get a program to loop back through the code?

Frank,

I suggest download this book form Mahesh Chand, this covering almost all basics.

Free Book: C# Programming for Beginners

I apologize for getting too advanced for you. A switch statement can be converted to a bunch of "if" statements but it will be good for you to know about the switch statement. First, loook at the documentation of the switch statement; it is more complete.

A switch statement has an expression and then case clauses; the case clauses are enclosed in curly braces ("{}"). There are multiple case clauses followed by an optional default clause. Each case clause must end with a "break"; see my sample code. The reason why "break" is necessary is because C# is so close to C++ but C# improved the switch statement so that it is a little easier to use and it won't allow programming mistakes to happen that could be difficult to diagnose during execution.

My teacher isn't really teaching us to code we have another one coming in to teach because my teacher can't teach prog. (Which I don't know why she's the teacher if she can't) but we kind of moved from one coding language to another we only covered the basics of C# so I never learned about switch statements.
 Anyhow I'm getting this error from the swtich statement.

"Control cannot fall through from one case label ('case "+":') to another"

The same goes for the other operators.

As long as this is not a class assignment, and since you have tried to do it yourself, the following is a skeleton showing what I was suggesting.

static Boolean Calculate()

{

	Boolean Continue = true;

	Console.WriteLine("Enter q, +, -, * or /");

	switch (Console.ReadLine().ToLower())

	{

		case "q":

			Continue = false;

			break;

		case "+":

			Console.WriteLine("Add");

			break;

		case "-":

			Console.WriteLine("Subract");

			break;

		case "*":

			Console.WriteLine("Multipy");

			break;

		case "/":

			Console.WriteLine("Divide");

			break;

		default:

			Console.WriteLine("Huh?");

			break;

	}

	return Continue;

}

I think the answer to the question "put each calculation in a different function" is yes, but I am not sure what you are doing. If you want the output of one calculatio to be the input to another, then you will need to do something to allow that. It is easy; just make a member variable in the class. Since you want to support multiple function (Addition, Subtraction, Division, Multiplaction) you should have a function that does any / all operatoins. So instead of an Addition function, you want a calculation function that asks for what function to perform. You can do it differently and put the code in the Main that asks what function to do. It depends on personal preference and I was suggesting one way.

So your saying put each calculation in a different function such as this?
private static void Addition()
{
      int Add1 = 0;
      int Add2 = 0;
      string userinput = ""; 

      if (userinput == "+")
      {
            Console.Clear();
            Console.WriteLine("Enter The First Number You Would Like To Add: ");
            Add1 = Int32.Parse(Console.ReadLine());
            Console.WriteLine("Enter The Second Number You Would Like To Add: ");
            Add2 = Int32.Parse(Console.ReadLine());
            Console.WriteLine("The Answer Is: {0} ", Add1 + Add2);
       }
}
And then add a while loop inside the Main() function so it will loop through?

Oh and also now once I put all of the (Addition, Subtraction, Division, Multiplaction) into a seperate function it wouldn't continue with the program. It would just end once the user chooses an operator. Do you want to see the full code or is that not needed?

It's not a class assignment anymore but I just thought to myself that I wanted to add on to the one we made in class and make it a little better. So I'm learning in class as well as at home so I can learn more I guess you could say.

Why are you using a console program for this? You can if you want to. I am asking in case you might choose to use a form application instead. If you are using a console program becasue it seems easier, note that the user interface might make the console program more work insted of less work. Is this a class assignment?
 
What I would do is to put most of the programming for a calculation in a separate function. Then I might execute that function once, then do a loop. The loop would be like your loop where you ask if they want to do another. If they answer no, then the loop would end. If they asnwer yes, then it would do the other function again. The function could even return a boolean value indicating whether to continiue. So your Main function just needs to have in it "while (Calculate());". Can you figure that out?