Can't get the JS project right

Question

Error message: Execution timed out

Answer 1

13 is something else for me(tip calculator). Can you tell more details, description.. And along with share your try so that it helps to find what is going wrong in code...!

Answer 2

I'm noob and having difficulties to get the simplest of codes right. Could someone please explain me how to solve Javascript course's project number 13. It is in the section about loops...