Method average

src/main/java/com/thealgorithms/maths/Average.java:32–41

Computes the arithmetic mean of a double array. The average is calculated as the sum of all elements divided by the number of elements: avg = Σ(numbers[i]) / n. @param numbers a non-null, non-empty array of double values @return the arithmetic mean of the given numbers @

(double[] numbers)

     * @throws IllegalArgumentException if {@code numbers} is {@code null} or empty
     */
    public static double average(double[] numbers) {
        if (numbers == null || numbers.length == 0) {
            throw new IllegalArgumentException("Numbers array cannot be empty or null");
        }
        double sum = 0;
        for (double number : numbers) {
            sum += number;
        }
        return sum / numbers.length;
    }

    /**
     * Computes the arithmetic mean of an {@code int} array.