Answers for "how to get average from array of array"

how to calculate average of array in javascript

const arrAvg = arr => arr.reduce((a,b) => a + b, 0) / arr.length

getting average of array javascript

var total = 0;
for(var i = 0; i < grades.length; i++) {
    total += grades[i];
}
var avg = total / grades.length;

array average

public class ArrayAverage {
    public static void main(String[] args) {
        double[] numbers = new double[5]; //double[] arr = {6.7, 8.9, 2.7, 6, 1};
        numbers[0] = 6.7;
        numbers[1] = 8.9;
        numbers[2] = 2.7;
        numbers[3] = 6;
        numbers[4] = 1;

        double sum = 0;

        for (int i = 0; i < numbers.length; i++) {
            sum = sum + numbers[i];
        }
        System.out.println(sum);
    }
}