I don't use JavaScript so I can't see your current solution, but if you are going through all numbers up to n and counting 9 inside each one, it will be too slow (even with just this "simple loop" rather than an "infinite loop").

Maybe the 50ms timing is for very small tests you have tried? Like with n = 100 or something? In the full kata tests the input n goes to 10**19 - try your function with this value on your PC tests if you want to see how fast it is.

My function finish it in 50ms but on codewars i can't run tests , it's saying that the function times out. Can't because the code is fast with no infinite loops

It is still unsoluble,...

You're awesome to be able to focus on that, but the sense of accomplishment that comes with a solution is unparalleled.

I don;t think there's too many test inputs. In Javascript, there's 100 random tests, and each can have numbers up to 100 digits long. My JavaScript solution passes the tests in ~1 second. I think tests are balanced quite well, you just need better algorithm.

Feel free to join Codewars Discord, you could get some help in the #help-solve channel!

Timeout error , my code is not long or hard to read , what happening ? fix this bug

Thank you very much, your answer helped me to understand

Also, important: you must always use the return instruction a the end of your function. print has no effect (it just diplays stuff on the screen).

Hi. Please post in English (you can help yourself with an online translator if you need).

You must not use input here, nor call the function in your code. Just complete the code of the function. The tests call your function with different argument and check it returns the right answer.

Remove this:

num=int(input())
digital_root(num)

Answered.

Можливо я не зрозумів суті, але чому мені видає помилку EOFError: EOF when reading a line

That was not hard