How to stop a setInterval() function?

Question

I used one calling setInterval(timer,1000) but when i try to stop it, the clearInterval() don't work

Answer 1

Example:

var st = setInterval(timer,1000)
clearInterval(st)

It will work.

Answer 2

Yes, when you clear the interval, you have to tell inside () what interval you are clearing.

Answer 3

So... I have to assign the interval into a variable, not just declare the set and after the clear?

Answer 4

Okay, thanks