Thanks for explaining, that makes sense.

Shouldn't "best practice" involve a default case?

1. For most of the Katas that I have completed I fail the "Run Test" but succeed on the "Submit". Am I using the "run test" button wrong somehow?
2. On two different Katas I have first "Run Test" but failed, tried to "Submit" but I get a message back that the process times out and that I fail. When I go to my profile page I have them marked as complete. Why do I get fail message although the site recognizes my answer as correct?

I thought the three test cases (when you press test, not submit) was only for the test cases shown, which use small numbers. Shoudn't that be working even with a terrible solution?

It says that I have completed this Kata, but I have got the red Incorrect message every time I've tried to submit. The operation times out every time, even on the test cases. Why is this? My solution works when I test it in JSFiddle.