Would you be a surgeon, you could reconcile your hobby and job – lay out according to this code visceral organs of a patient. The Θ reminds me a kidney.

6 KYU at least. Hard for seveners.

The cleverest for me, because it is the only solution which logic I got of from the first glimpse.

Thanks, but I do not see the logic behind it.

The same. And I'd also like to know if it's universal with other arithmetic progressions.

Yes! It took me about 3 hours of observation to see the pattern.
P.S. Hint, maybe. Not a spoiler.

I am not splitting hairs, but isn't it regarded as bad practice to omit curly brackets around statements? I vaguely remember having read about it somewhere at MDN though.

Developers with that style of coding get more salary, isn't it?

Yes, quite obvious.
Used to use it while debugging without a second thought.
Thx a lot!

Hi there,
Can some of you explain me why
console.log(input.length),
added while debugging the solution, gives a TypeError: cannot read properties of null
in test case of NULL (i.e. null.length => aforementioned TypeError) and prevents me from completing the kata?
I used to think that console.log(whatever happens inside it) has no effect on the overall outcome of the program apart from throwing some alert on the screen.