1822. Sign of the Product of an Array

package LeetCode_1822

/**
 * 1822. Sign of the Product of an Array
 * https://leetcode.com/problems/sign-of-the-product-of-an-array/
 *
 * 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).

Example 1:
Input: nums = [-1,-2,-3,-4,3,2,1]
Output: 1
Explanation: The product of all values in the array is 144, and signFunc(144) = 1

Example 2:
Input: nums = [1,5,0,2,-3]
Output: 0
Explanation: The product of all values in the array is 0, and signFunc(0) = 0

Example 3:
Input: nums = [-1,1,-1,1,-1]
Output: -1
Explanation: The product of all values in the array is -1, and signFunc(-1) = -1

Constraints:
1. 1 <= nums.length <= 1000
2. -100 <= nums[i] <= 100
 * */
class Solution {
    fun arraySign(nums: IntArray): Int {
        if (nums.isEmpty()) {
            return 0
        }
        var sign = 1
        for (num in nums) {
            if (num == 0) {
                return 0
            }
            if (num < 0) {
                sign *= -1
            }
        }
        return sign
    }
}