프로그래머스 - 배열의 평균값

class Solution {
    public double solution(int[] numbers) {
        double answer = 0;
        double sum =0;

        for (int i = 0; i < numbers.length; i++) {

            sum += (double)numbers[i];

        }

        answer = sum/(numbers.length);
        return answer;
    }
}