Introduction to Javascript by Udacity

In this course, you will use learn the basics of JavaScript! You will learn how to create and use the primary data types in JavaScript and how to use conditionals and loops to control the flow of your JavaScript code. You'll write your first JavaScript functions and you'll learn how to use arrays and objects to store collections of data. By the end of the course, you use your new JavaScript knowledge to build the core functionality of an eCommerce shopping cart.