2215. Find the Difference of Two Arrays

Question

There is a function signFunc(x) that returns:

• 1 if x is positive.
• -1 if x is negative.
• 0 if x is equal to 0.

You are given an integer array nums. Let product be the product of all values in the array nums.

Return signFunc(product).

Solution

遍历并检查当前元素的正负性，如果为负值则改变符号。

如果为0则返回0。

Code

class Solution {
    public int arraySign(int[] nums) {
        int res = 1;

        for(int i = 0; i < nums.length; i++){
            if(nums[i] < 0){
                res = -res;
            }
            else if(nums[i] == 0){
                return 0;
            }
        }
        return res;
    }
}