![]() Numbers don't have quotes around them.Ī True/False value. To signify that the variable is a string, you should enclose it in quote marks.Ī number. Note that variables have different data types: VariableĪ sequence of text known as a string. You can retrieve the value by just calling the variable by name: myVariable Īfter giving a variable a value, you can later choose to change it: var myVariable = 'Bob' You can do both these operations on the same line if you wish: var myVariable = 'Bob' If you are getting problems in your code, check the casing!Īfter declaring a variable, you can give it a value: myVariable = 'Bob' Note: JavaScript is case sensitive - myVariable is a different variable to myvariable. To start, we'll show how to add some basic JavaScript to your page, creating a "hello world!" example ( the standard in basic programming examples). You may have to start small and keep working in small consistent steps. However, becoming comfortable with JavaScript is a little harder than becoming comfortable with HTML and CSS. The above section might sound really exciting, and so it should - JavaScript is one of the most lively web technologies, and as you start to get good at using it, your websites will enter a new dimension of power and creativity. You can learn all that in detail later on, in our JavaScript learning area, and in the rest of MDN.īelow we will introduce you some aspects of the core language, and you'll also play with a few browser API features too. Third-party frameworks and libraries you can apply to your HTML to allow you to rapidly build up sites and applications.īecause this article is only supposed to be a light introduction to JavaScript, we are not going to confuse you at this stage by talking in detail about what the difference is between the core JavaScript language and the different tools listed above.Third-party APIs to allow developers to incorporate functionality in their sites from other content providers, such as Twitter or Facebook. ![]() Browser Application Programming Interfaces ( APIs) - APIs built into web browsers, providing functionality like dynamically creating HTML and setting CSS styles, collecting and manipulating a video stream from the user's webcam, or generating 3D graphics and audio samples.Developers have written a large variety of tools on top of the core JavaScript language, unlocking a vast amount of extra functionality with minimum effort. JavaScript itself is fairly compact yet very flexible. With more experience, you'll be able to create games, animated 2D and 3D graphics, comprehensive database-driven apps, and much more! ![]() You can start small, with carousels, image galleries, fluctuating layouts, and responses to button clicks. It was invented by Brendan Eich, co-founder of the Mozilla project, the Mozilla Foundation, and the Mozilla Corporation. ![]() JavaScript ("JS" for short) is a full-fledged dynamic programming language that, when applied to an HTML document, can provide dynamic interactivity on websites. This article helps you get started with this exciting language and gives you an idea of what is possible. JavaScript is a programming language that adds interactivity to your website (for example: games, responses when buttons are pressed or data entered in forms, dynamic styling, animation). ![]()
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