Listing 2.30: out variable still avaiable out of the if block

[transbot]

P.75 "The result is that the number variable is available from both the true and false consequence of the if statement but not outside the if statement."

In fact, the variable is still in scope outside of the if block.

            // double number;
            string input;
            System.Console.Write("Enter a number: ");
            input = System.Console.ReadLine();
            if (double.TryParse(input, out double number))
            {
                System.Console.WriteLine($"input was parsed successfully to {number}.");
            }
            else
            {
                // Note: number scope is here too (although not assigned)
                System.Console.WriteLine("The text entered was not a valid number.");
            }

            System.Console.Write($"the value of number is {number}.");

How do I modify the statement of the text?

[MarkMichaelis]

So sorry about the delay. I am just wrapping up C# 8.0. 😊 Please don't hesitate to provide feedback.

I have this change already in the next edition and, thanks to your email, I have updated the Erratahttps://github.com/IntelliTect/EssentialCSharp/blob/v7.0/Essential-C%23-v7.0-Errata.md as well.

Mark