use $ in javascript code example

Example 1: javascript dollar sign

//without jQuery, $ is just another symbol in JavaScript
//with jQuery, it's how you declare jQuery objects.
$('#selector').text('jQuery rocks!');

Example 2: JavaScript Syntax

var x, y, z;       // Declare Variables
x = 5; y = 6;      // Assign Values
z = x + y;         // Compute Values

var x;

x = 6;