Beginning C# 7 Hands-On - The Core Language

Running the program

With all of this in place, let's give this a go. Click on Debug > Start Without Debugging or Ctrl + F5 key combination. If all goes well, you should see the following result:

Figure 4.4: The Debug window

Okay, so we have Sum=19 and Average=3.8. It's working as expected, and we returned two values as a tuple.

Here's the final Default.aspx.cs code for this chapter:

using static System.Console; 
//tuple: a way of grouping items together 
class Program 
{ 
    static (double sum, double average) Summarize(double[] arr) 
    { 
        double sum = 0, average = 0; //set to 0 so the sum and averages  //are not distorted foreach (var d in arr) //grab ...