Review

INTRODUCTION TO JAVASCRIPT

Review

Let’s take one more glance at the concepts we just learned:

• Data is printed, or logged, to the console, a panel that displays messages, with console.log().
• We can write single-line comments with // and multi-line comments between /* and */.
• There are 7 fundamental data types in JavaScript: strings, numbers, booleans, null, undefined, symbol, and object.
• Numbers are any number without quotes: 23.8879
• Strings are characters wrapped in single or double quotes: 'Sample String'
• The built-in arithmetic operators include +, -, *, /, and %.
• Objects, including instances of data types, can have properties, stored information. The properties are denoted with a . after the name of the object, for example: 'Hello'.length.
• Objects, including instances of data types, can have methods which perform actions. Methods are called by appending the object or instance with a period, the method name, and parentheses. For example: 'hello'.toUpperCase().
• We can access properties and methods by using the ., dot operator.
• Built-in objects, including Math, are collections of methods and properties that JavaScript provides.

Here are a few more resources to add to your toolkit:

• Codecademy Docs: JavaScript
• Codecademy Workspaces: JavaScript

Make sure to bookmark these links so you have them at your disposal.