What is wrong in this code?

Question

https://code.sololearn.com/WlUXmOfAVK04/?ref=app

Answer 1

The *break* keyword is used to stop a loop (for, while, ...). In your case you are setting an interval - not a loop. To stop an interval first you have to assign the interval to a variable:
var interval = setInterval(a, 40);
Only then you can stop that interval with:
clearInterval(interval);

Answer 2

Also i don't understand why you want to return there. It achieves nothing. Are you sure you don't want to move the document.write below the return statement.

Answer 3

Thanks all I underestood