C# Program to Find the Average of an Array

This program utilizes the C# language to calculate the average of an array of numbers. It employs fundamental concepts of array manipulation and basic arithmetic operations.

Problem statement

You are tasked with writing a C# program that calculates the average of a set of numbers stored in an array.

C# Program to Find the Average of an Array

using System;

class Program
{
    static void Main()
    {
        // Define an array of numbers
        int[] numbers = { 1, 2, 3, 4, 5 };

        // Call the method to calculate the average
        double average = CalculateAverage(numbers);

        // Print the average
        Console.WriteLine("The average is: " + average);
    }

    static double CalculateAverage(int[] arr)
    {
        // Initialize sum to 0
        int sum = 0;

       // Iterate through the array and add each element to the sum
        foreach (int num in arr)
        {
            sum += num;
        }

        // Calculate the average
        double average = (double)sum / arr.Length;

        return average;
    }
}

How it works

Here’s the program with explanations:

Define an Array:

• We start by defining an integer array named numbers. In this example, we have hardcoded the values {1, 2, 3, 4, 5} into the array.

2. Call the CalculateAverage Method:

• We call a method named CalculateAverage and pass the numbers array as an argument. This method is responsible for finding the average.

3. CalculateAverage Method:

• This method takes an integer array arr as a parameter.
• It initializes a variable sum to 0, which will be used to accumulate the sum of all elements in the array.

4. Iterate Through the Array:

• The program uses a foreach loop to iterate through each element num in the arr array.
• Inside the loop, it adds the value of num to the sum variable, effectively summing up all the elements in the array.

5. Calculate the Average:

• After the loop has iterated through all elements, the program calculates the average. It divides the sum by the length of the array, which is accessed using arr.Length.
• To ensure that the result is a floating-point number (decimal), it casts the sum to double.

6. Print the Average:

• Finally, the program prints the calculated average to the console using Console.WriteLine.

When you run this program, it will calculate the average of the numbers in the numbers array and display it as output. You can customize this program by providing a different array or by accepting user input to populate the array dynamically.

Input/Output