For-Each Loops

Average Rating

Let's see how we'd use a for-each loop to refactor the average rating function.

java

public class AverageCalculator {

    public static double average(double[] arr) {
        double total = 0;

        for (double x : arr) {
            total += x;
        }

        return total / arr.length;
    }

    public static void main(String[] args) {
        double[] ratings = {4.25, 3.34, 2.6, 2.74, 2.36, 2.32, 3.94, 2.73};
        System.out.println(average(ratings));
    }
}

output

3.035

TIP

We chose the name x here to refer to the current array element, but any variable name is fine.