In python + ( add comment to function)

Write a function squareUpTo(n) that takes as input a positive integer n, and returns a list of all the square numbers up to (and possibly including) n. Test cases: squareUpTo(10) should return [0, 1, 4, 9]. squareUpTo(100) should return [0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100)