learn regex :)))

Don't worry, glad you learned something new.

Oh, now I see!
Yes, it makes sense to use regular expressions, in some languages more than in others.
Most solutions use a regexp replace function.
Even if it first seemed artificial and overly complicated to me.
But in some languages it is one not so complicated way to solve the kata.
The topic of the kata is conversion int -> string and formatting. Regexp can do both.
So this tag is a hint of one method to solve the kata.

If I first had studied the solutions and thought about it, it wouldn't have been necessary to give my suggestion.
Sorry, that I bothered you and thaks for your help.
This case was quite instructive for me. CodeWars is a wonderful place to learn new ideas!

Go to Solutions, see how you can use regular expressions to solve this kata. In some languages you'll find more than in others.

You need formatted output.
Why would you use Regexp which matches patterns?
I can think only using it for testing your result, which is done anyway.

Why? You can use regular expressions if you want, you're not forced to do it tho.

The tag Regular Expression does not fit. Please delete it.

I learned replace method from this kata

small tricky kata!

Approved by author secretly

Thanks!

enjoyed this one; thanks!

enjoied this, good