c# switch problem

Question

I\'m new to programming and having a problem with the following code:

    private string alphaCoords(Int32 x)
    {
        char alphaChar;

        switch (         


        

Answer 1

You need to add a default to your switch statement.

The compiler is stating that there are some cases which will not assign a value to the variable. So adding

default:
  alphaChar = 'x'
break;

will tell the compiler "so in case I miss some scenario, make the value this"

or in the case of not wanting to assign a default:

  default: throw new Exception();

This is not necessarily better but another way of doing it:

 private string alphaCoords(Int32 x)
    {
      if(x >= 0 && x =< 9)
           return ((char)(x + 65)).ToString();
      else
        throw new ArgumentException();
    }