what's the difference between javascript timeout and timer methods

Question

JS support timeout and timer. Here is their definition:

timeout - repeat execution of a code within specific time and it returns an integer that can be used to cancel pending timeout.

var timeout_id = setTimeout(f,500);
cleartTimeout(timeout_id);

timer - repeat exectuion of code at specific interval.

id = setInterval(F,5000);
clearInterval(id)

I am a little confused, what is their difference?

Answer 1

setTimeout executes the code only once.

setInterval executes the code at every xxx amount of time.