JavaScript is the world's most popular programming language.
JavaScript is the programming language of the Web.
JavaScript is easy to learn.
This tutorial will teach you JavaScript from basic to advanced.
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Examples in Each Chapter
With our "Try it Yourself" editor, you can edit the source code and view the result.
Use the Menu
We recommend reading this tutorial, in the sequence listed in the menu.
If you have a large screen, the menu will always be present on the left.
If you have a small screen, open the menu by clicking the top menu sign ☰.
Learn by Examples
Examples are better than 1000 words. Examples are often easier to understand than text explanations.
This tutorial supplements all explanations with clarifying "Try it Yourself" examples.
If you try all the examples, you will learn a lot about JavaScript, in a very short time!
JavaScript Examples »
Why Study JavaScript?
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
This tutorial covers every version of JavaScript:
- The Original JavaScript ES1 ES2 ES3 [1997-1999]
- The First Main Revision ES5 [2009]
- The Second Revision ES6 [2015]
- The Yearly Additions [2016, 2017, 2018]
Learning Speed
In this tutorial, the learning speed is your choice.
Everything is up to you.
If you are struggling, take a break, or re-read the material.
Always make sure you understand all the "Try-it-Yourself" examples.
The only way to become a clever programmer is to: Practice. Practice. Practice. Code. Code. Code !
Commonly Asked Questions
- How do I get JavaScript?
- Where can I download JavaScript?
- Is JavaScript Free?
You don't have to get or download JavaScript.
JavaScript is already running in your browser on your computer, on your tablet, and on your smart-phone.
JavaScript is free to use for everyone.
My Learning
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JavaScript References
W3Schools maintains a complete JavaScript reference, including all HTML and browser objects.
The reference contains examples for all properties, methods and events, and is continuously updated according to the latest web standards.
Complete JavaScript Reference »
JavaScript Quiz Test
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w3schoolsCERTIFIED.2022SQL is a standard language for storing, manipulating and retrieving data in databases.
Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems.
Start learning SQL now »
Examples in Each Chapter
With our online SQL editor, you can edit the SQL statements, and click on a button to view the result.
Click on the "Try it Yourself" button to see how it works.
SQL Exercises
Test Yourself With Exercises
Exercise:
Insert the missing statement to get all the columns from the Customers
table.
Start the Exercise
SQL Examples
Learn by examples! This tutorial supplements all explanations with clarifying examples.
See All SQL Examples
SQL Quiz Test
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SQL References
At W3Schools you will find a complete reference for keywords and function:
SQL Keyword Reference
MYSQL Functions
SQLServer Functions
MS Access Functions
SQL Quick Reference
SQL Data Types
Data types and ranges for Microsoft Access, MySQL and SQL Server.
SQL Data Types
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