learn Collections please

классно, но не совсем понятно

I have got a solution which is basically the same haha :)

Use spoiler flag next time, please.

And also no need to convert it to array and then find length, we can directly using count() terminal operation ( Need to downcast it to int though )

0.01d here means to divide the original result by 100, and then keep the final result to two decimal places.

oh nice, this is exactly what I did - except for the double y line - I'm just beginning to mess with Java - what does the 0.01d part do exactly ? I get why you'd multiply by 0.01 I'm just curious about the 'd' really.

Also please see this FAQ for how to best debug your solution and ask for help.
Namely it would be nice if you put your code in a code block, and mentioned which programming language you are using.

Not a kata issue, your solution is wrong. It does not conform to followign requirement:

The number can be negative already, in which case no change is required.

Java.
If the issue have aready been reported, maybe you can think about fix it ?
It's a 8e kyu, not a 2e kyu. No need to put this kind of test, if the other are fine ...

Error!
expected:< null> but was:<>
Please Help

Thanks, it works.