Creating the tuple function

Start a new Visual C# console app and simplify the template back to our standard opening code:

using static System.Console; 
 
class Program 
{ 
    static void Main() 
    { 
 
    } 
} 

Create a new function that will return a tuple. Underneath the opening curly brace of our Program class, type the following:

static (double sum, double average) Summarize(double[] arr) 
{ 
 
} 

Here, I'm defining the return type of the function, which in this case is a tuple. We're returning two values here and defining each of their data types. That's the unique benefit of tuples: being able to return two values from a single function call. We're calling it Summarize, and it will accept an argument called arr of type double array--so an array of doubles. It's going to return a tuple, which specifically means two values.

With this in place...