What does the function SetInterval(function_name, milliseconds_timer) return ??

Question

We call the function SetInterval like var t= SetInterval (function_name, milliseconds_timer) ;

What is the value present in t ??

Answer 1

It returns an identifier of the timer, it's keeping all times in an array and returns the indices, you can use that number to clear the interval.

clearInterval(5); //example

Answer 2

It works the same way whether we declare a variable t or not !!!!!!!