JavaScript is one of the 3 languages all web developers must learn: 1. HTML to define the content of web pages. 2. CSS to specify the layout of web pages. 3. JavaScript to program the behavior of web pages

What is JavaScript? JavaScript is the programming language of the web. It can update and change both HTML and CSS. It can calculate, manipulate and validate data.

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

The syllabus outline and its sequence are structured so you can learn JavaScript step by step, from the introduction to creating your first application with JavaScript. Get Started With JavaScript » Learning Outcomes

We have gathered a variety of React exercises from most of the chapters in our JavaScript Tutorial. The exercises are a mix of "multiple choice" and "fill in the blanks" questions. The answer can be found in the corresponding tutorial chapter.

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

JavaScript uses the keywords var, let and const to declare variables. An equal sign is used to assign values to variables. In this example, x is defined as a variable.

If you don't know JavaScript, we suggest that you read our JavaScript Tutorial from scratch.

A JavaScript function is a block of code designed to perform a particular task. A JavaScript function is executed when "something" invokes it (calls it).