Question

Write a function in C# that takes an array of double as the parameter, and return the average

Answer 1

For this we would need 2 methods first to calculate the sum,

public double Sum(params double[] arr)
            {
               double result = 0.0;

               for(int i = 0; i < arr.Length; i++)
               {
                  result += arr[i];
               }

               return result;
            }

and another one to calculate the average using the sum method listed above.

  public double Average(params double[] arr)
        {
            double sum = Sum(arr);
            double result = (double)sum / arr.Length;
            return result;
        }

The full code is

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public double Sum(params double[] arr)
            {
               double result = 0.0;

               for(int i = 0; i < arr.Length; i++)
               {
                  result += arr[i];
               }

               return result;
            }
        public double Average(params double[] arr)
        {
            double sum = Sum(arr);
            double result = (double)sum / arr.Length;
            return result;
        }
        public static void Main(string[] args)
        {
            double[] values={1.0,2.0,3.0,2.3};
            Console.WriteLine("Hello, world!");
            Console.WriteLine(values.Average());
        }
    }
}