프로그래머스: 평균 구하기

class Solution {
    public double solution(int[] arr) {
        
        int len = arr.length;
        int sum = 0;
        for (int x=0; x<len; x++) {
            sum += arr[x];
        }
        return (double)sum / len;
    }
    public static void main(String[] args) {
        int[] arr = {1,2,3,4};

        Solution sol = new Solution();
        double result = sol.solution(arr);
        
        System.out.println(result);
    }
}