Squares of the Positives

You get an array of integers, nums.

Return a new array with the square of every number above 0. A number's square is the number times itself.

Keep the squares in the order of their numbers in nums.

Leave out 0 and the negative numbers. If no number is above 0, return an empty array.

Example 1:

Input: nums = [3, -1, 0, 4]
Output: [9, 16]
Explanation: Only 3 and 4 are above 0.
3 times 3 is 9, and 4 times 4 is 16.

Example 2:

Input: nums = [-5, -2, 0]
Output: []
Explanation: No number is above 0.

Example 3:

Input: nums = [1, 2, 3]
Output: [1, 4, 9]
Explanation: Every number is above 0, so every number is squared.

Constraints:

• nums may be empty.
• Every number is between -1000 and 1000.