# 1822. Sign of the Product of an Array

https://leetcode.com/problems/sign-of-the-product-of-an-array

## Description

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`

## ac

```java
```
