settimeout in javascript automatic code example

Example 1: javascript set timeout

setTimeout(function(){
 	console.log("hello");
}, 3000); //wait for atleast  3 seconds before console logging

Example 2: js after settimeout

function doHomeWork(subject, callback){
    setTimeout(callback,500);
    console.log("doing my homework:", subject)
}

doHomeWork("Maths", function(){console.log("finished my homework");});