What is diffrent's between setTimeout & setInterval ?

Question

What is diffrent's between setTimeout & setInterval ?

Answer 1

In simple term,

setTimeout() will execute script only once after x milliseconds.
eg)setTimeout(function(){ alert("Hello"); }, 3000);//after 3 sec

setInterval() will execute script after every x milliseconds
eg)setInterval(function(){ alert("Hello"); }, 3000);//after every 3 sec

Answer 2

setTimeout - calls a function once, setInterval - calls a function many times