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Welcome to Learn JavaScript!
An in-depth course on the basics of JavaScript.
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Introduction to JavaScript
A brief history of JavaScript and an overview of its basic rules.
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Null and undefined values
Learn how to use JavaScript's null and undefined data types.
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The "new" keyword
Call functions using the `new` keyword to create objects.
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The "return" keyword
Use the `return` keyword to get more out of your functions.