Refer to the top-voted solutions.

You didn't specify what your function should return. Although it seems you've solved the problem.

return something.

I have sorted this now. Thanks for your help :)

By chance, the only valid inputs (that break with the bug), are stings with length of two. So, I basically reassigned the pound sign as such:

(n.length===2) ? m=n.slice(1)+"P" : m=n;

haha.. good one dude 6988ms.

hint please!!!! I only fail that test!!

Pound Sign has an A. And.. test case don't make sense, you already mentioned maximum is 5 pounds, so why is there a 10 pounds.

And can you include the 2 10 cents as test case upfront. So that I will be the last victim.

Oh ya good work, I enjoyed the challenge.

ok I just solved it.. by accident.

Can any kind soul tell me about matching hypen only?

Try to use a simpler regex, and testing for the string to be true first.. ;)