public class Solution
extends Object
1822 - Sign of the Product of an Array\.
Easy
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 <= nums.length <= 1000`
* `-100 <= nums[i] <= 100`