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Implement 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