Proper Syntax of ClearInterval?

Question

I have a Javascript code, what is the appropriate syntax for calling a ClearInterval function on a setinterval?

Answer 1

var interval = setInterval(DoStuff, 20);
clearInterval(interval);

Answer 2

if you assign the setInterval() function to a variable, you can use that variable to clear it like in Jason Edelson 's example

Answer 3

https://code.sololearn.com/W2K9zwKK9Nk9/?ref=app