Basics
The fundamentals of JavaScript

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In this unit we’ll introduce JavaScript, from the ground up.

JavaScript is an incredibly powerful, dynamic and useful language, and it powers the entire Web ecosystem.

It has one key, major advantage over any other programming language: it’s the only language browsers know.

Let’s explore its basics in detail:

Lessons in this unit:

0: ▶︎ Introduction
1: Literals, identifiers and variables
2: Comments
3: The difference between let, const and var
4: Types
5: Operators and expressions
6: Let's start with arithmetic operators
7: The assignment operator
8: Operators precedence
9: Strings
10: Numbers
11: Semicolons, white space and sensitivity