self executing function jquery vs javascript difference

Question

What are the difference among -

First :-

(function () {

    var Book = \'hello\';

}());

Second:-

Answer 1

All three examples are Immediately Invoked Function Expressions (IIFE).

The only difference is that in the third example jQuery is being passed in as a variable allowing you to use it within the IIFE using its dollar naming convention. e.g.

(function ($) {
  var Book = 'hello';
  $('#bookelement').html(Book);
})(jQuery);