what does setinterval return code example

Example 1: jquery call function every second

setInterval(function(){ 
    //this code runs every second 
}, 1000);

Example 2: javascript setinterval

setInterval(function(){ 
	console.log("Oooo Yeaaa!");
}, 2000);//run this thang every 2 seconds

Example 3: js setinterval

function func(){
  console.log("Ran")
}
setInterval(func,1000)//Runs the "func" function every second