프로그래머스: 내적

class Solution {
    public int solution(int[] a, int[] b) {
        int answer = 0;
        
        for (int x=0; x<a.length; x++) {
            answer += a[x] * b[x];
        }
        return answer;
    }
    public static void main(String[] args) {
        int[] a = {1,2,3,4};
        int[] b = {-3,-1,0,2};
        
        Solution sol = new Solution();
        int result = sol.solution(a, b);
     
        System.out.println(result); 
        
    }
}