1(() => {
2  // statements
3})();

1var result = (function () {
2    var name = "Barry"; 
3    return name; 
4})(); 
5// Immediately creates the output: 
6result; // "Barry"

1(function() {
2  /* */
3})()
4

1(function () {
2    var aName = "Barry";
3})();
4// Variable aName is not accessible from the outside scope
5aName // throws "Uncaught ReferenceError: aName is not defined"
6

1/*An IIFE (Immediately Invoked Function Expression) is a JavaScript 
2function that runs as soon as it is defined
3*/
4
5(function () {
6        //write your js code here
7});