[Programmers] 내적 (Java)

• Reference

Solution

class Solution {
    public static int solution(int[] a, int[] b) {
        int answer = 0;
        for (int i = 0; i < a.length; i++) {
            answer += a[i] * b[i];
        }
        return answer;
    }

    public static void main(String[] args) {
        System.out.println(solution(new int[]{1, 2, 3, 4}, new int[]{-3, -1, 0, 2}));
        System.out.print(solution(new int[]{-1, 0, 1}, new int[]{1, 0, -1}));
    }
}