How is a closure different from a callback?

Question

I asked a question about callbacks and arrived at another question (see comment). How is a closure different from a callback?

Answer 1

closure :

• A function keyword inside another function, you are creating a closure

• Or A function return to an other function we can say closure

Note Plain English : A little bit difference function passing as argument in another function is callback or if define in another function is closure

var length = 101;
function fn2() {
	console.log("fffxxx: "+this.length);
}
 
var obj = {
  length: 5,
  method3: function(fn) {
    fn();
    arguments[0]();
  }
};
 
obj.method3(fn2, 1);
   

**Outputहोगा

fffxxx:101
fffxxx:2**