Web Reference: Lesson 2: Working with Variables and Data in JavaScript Objectives Use attributes and methods to communicate with users, including the type attribute, and the alert(), prompt() and confirm() methods Define variables Use data types, including null and undefined Declaring JavaScript Variables Creating a variable in JavaScript is called declaring a variable. You declare a JavaScript variable with the let keyword or the const keyword. In this lesson, you'll learn how to store information in variables and work with different types of data. Variables are like labeled boxes where you can store values and use them later in your code.
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