Question

I would like to know an alternative way to write this code without using a Linq Method Average().

   double[] array1 = { 1, 2, 3, 5, 0 };
        double average1 = array1.Average();
        Console.WriteLine(average1);

Answer 1

No idea why you wouldn’t want to use the LINQ Average function but you could loop through the elements of the array in order to calculate the sum and finally divide by the number of elements:

double[] array1 = { 1, 2, 3, 5, 0 };
double average1 = 0;
foreach (var item in array1)
{
    average1 += item;
}
average1 = average1 / array1.Length;
Console.WriteLine(average1);

Now that you look at this code it is clear why the following is much better:

double[] array1 = { 1, 2, 3, 5, 0 };
double average1 = array1.Average();
Console.WriteLine(average1);