How to Code JAVASCRIPT: *JavaScript Variables Using VAR*
Let's get started! 🔥🔥🔥 In this video, we will show you how to declare a JavaScript variable using var ⚡. We will discuss how it's different from let and const in a later video. You will learn some web development basics in about 5 minutes!
In this video, you will learn how to:
★ 0:07 Introduction of variables
★ 0:48 Declare variables in expressions
★ 2:08 JavaScript data types
★ 3:16 Declare multiple variables in one statement
★ 4:08 Undefined variable
★ 4:34 Re-declaring variables
★ 5:25 Concatenated variables
Tips and Tricks:
► JavaScript variables must be identified with unique names (or they won't get used, see 4:34 Re-declaring variables).
► The general rules for variable namecreation are:
★ Names can contain letters, digits, underscores, and dollar signs.
★ Names must begin with a letter.
★ Names can also begin with $ and _.
★ Names are case-sensitive (item and Item are two different variables).
★ Reserved keywords cannot be used as names (such as var and boolean).
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• 🌐 Web Development for Beginners
For the setup, please read the followings before you begin:
1. Download and install latest Visual Studio Code: https://code.visualstudio.com/Download
2. Install the Open in Browser extension for Visual Studio Code: Go to View and select Extensions, or select the Extensions icon, then search for "open in browser", published by TechER.
HTML - Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser.
CSS - Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in HTML.
JavaScript - JavaScript (JS) is a programming language that enables interactive web pages and is an essential part of web applications.
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