Hmm,interesting. Ok, i'll remember it. Thank's for help

You post was visible in the homepage discourse for all to see.

Hello, why my link is a spoiler? I post it at "answer section". I thought my comment can see only people, who resolve the problem or who used "unlock solution".

Use spoiler flag next time, please.

I see, I wasn't aware of that. Just seemed buggy.

Numbers go up to Number.MAX_SAFE_INTEGER, it'll take the entire day to loop to that. Try another approach, not a kata issue.

Ahh I see, I think looking back I was trying to be more explicit about why I was returning 0. It totally makes sense to just say if theres not a length then do this. Thanks for the feedback man. Hope you enjoy your day as well.

If the value is falsy you can use the logical not operator.
ex:
if(!x.length) and sometimes (!x)

I remeber reading an article about it. I'll try to find it!
Enjoy your day.

Can you explain why?

Comparing with 0 is not best practice.