using System;

public class Program

{

    //1. 'params' keyword allows us to pass a variable number of values into a method

    //2. Doing this means a single method is more flexible

    public static double FindSum(params double[] values)

    {

        double sum = 0; //3. Be sure to start with 0 so the sum will not be thrown off

        foreach (var d in values)

            sum += d; //4. sum +=d adds up the values in the array as the loop runs

        return sum; //5. Send total value or sum back to the body of Main

    }

    public static void Main()

    {

        Console.WriteLine("1+2={0}", FindSum(1, 2)); //6. Calls FindSum with 1,2

        Console.WriteLine("4+5+10={0}", FindSum(4, 5, 10)); //7. Now FindSum works with 4,5 and 10

    }

}