Program:

The source code to calculate the average of array elements in C# is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//Program to calculate the average of array elements.

using System;

class Avg
{
    public static void Main()
    {
        int[] arr = { 1, 2, 6, 2, 18 };
        
        int i=0;
        int sum = 0;
        float average = 0.0F;
        
        for (i = 0; i < arr.Length; i++)
        {
            sum += arr[i];
        }

        average = (float)sum / arr.Length;
        
        Console.WriteLine("Average of Array elements: "+ average);
    }
}

Output:

Average of Array elements: 5.8
Press any key to continue . . .

Explanation:

In the above program, we created a class Avg that contains the Main() method. In the Main() method we created an array of 5 integers initialized with some values.

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

Using the above code we calculate the sum of all array elements. Here Length property of array returns the length of the array.

average = (float)sum / arr.Length;

In the above code we find the average, as we know that average may be a floating-point number then here we typecast the variable sum into float type and finally get the average and then print the average on the console screen.