What is the meaning of “$” sign in JavaScript

Question

In the following JavaScript code there is a dollar ($) sign. What does it mean?

$(window).bind(\'load\', function() {
    $(\'img.protect\').pro         


        

Answer 1

From the jQuery documentation describing the jQuery Core Object:

Many developers prefix a $ to the name of variables that contain jQuery objects in order to help differentiate. There is nothing magic about this practice – it just helps some people keep track of what different variables contain.