C#: Find the larger average value between the first and the second half of a given array of integers

Last update on June 28 2025 12:53:55 (UTC/GMT +8 hours)

Largest Average Between Array Halves

Write a C# Sharp program to find the largest average value between the first and second half of a given array of integers. Minimum length is at least 2. Assume that the second half begins at index (array length)/2.

Sample Solution:

C# Sharp Code:

using System; // Importing the System namespace
using System.Collections; // Importing collections for non-generic interfaces
using System.Collections.Generic; // Importing collections for generic interfaces
using System.Linq; // Importing LINQ for querying collections
using System.Text; // Importing classes for handling strings
using System.Threading.Tasks; // Importing classes for handling asynchronous tasks

namespace exercises // Defining a namespace called 'exercises'
{
    class Program // Defining a class named 'Program'
    {
        static void Main(string[] args) // The entry point of the program
        {               
            // Outputting the result of the 'test' method with different integer arrays
            Console.WriteLine(test(new[] { 1, 2, 3, 4, 6, 8 })); 
            Console.WriteLine(test(new[] { 15, 2, 3, 4, 15, 11 })); 
        }               

        // Method to calculate the average of the first and second halves of an array and return the greater average
        static int test(int[] numbers)
        {
            // Calculating the average of the first and second halves of the array
            var firstHalf = Average(numbers, 0, numbers.Length / 2);
            var secondHalf = Average(numbers, numbers.Length / 2, numbers.Length);

            // Returning the greater of the two averages
            return firstHalf > secondHalf ? firstHalf : secondHalf;
        }

        // Method to calculate the average of a specified range in the array
        private static int Average(int[] num, int start, int end)
        {
            var sum = 0; // Variable to store the sum of elements within the specified range

            // Loop to sum elements within the specified range
            for (var i = start; i < end; i++)
                sum += num[i];

            // Calculating and returning the average of the elements in the specified range
            return sum / (num.Length / 2); // Here, it's dividing by (num.Length / 2), but it should be (end - start)
        }
    } 
}

Sample Output: