You have to test one more thing?
Back to theory of lesson..
For the purpose of this lesson, we'll also say that a number with a decimal part that is all 0s is also an integer, such as 7.0.
This means that, for this lesson, you can't just test the input to see if it's of type int.
so you have to also test for numbers like 3.00, 5.00, 5.000...meaning if a number have it's decimal part = 0, you have to return