Why does the app sometimes deem answers to practice wrong even when you get the same answer as the app?

Question

There are many occasions where I get the practice questions right, but the app says otherwise. The strange part is you can't progress without even getting the practice questions right. It happens when you even reference their solution.

Answer 1

I never faced this situation.

Answer 2

Email at [e-mail]

Answer 3

Capitalized, extra space, missing punctuation... these are some things that are often missed.

Answer 4

Pay attention more, I am sure that something is missed in your code.

Answer 5

Sometimes your answer is not the same type as the answer expected.
exemple : 4 and '4' are the same for you, not for the app

Answer 6

I have noticed, in some of the "solution" code, characters are missing or just aren't displayed properly. I know one "solution" code when I was looking at it noticed that it interpreted what was supposed to be a \n (line break) and actually broke the line but didn't display the line break characters.

like it should have been something like:

some code here \n more code

but it displayed in the solution window like:

some code here
more code

does this make sense? I apologize if it does not as I don't remember the specific example.