return Keyword: Syntax | Saylor Academy

Syntax

return [expression];

expression
The expression whose value is to be returned. If omitted, undefined is returned instead.

Course Introduction

Course Syllabus

Unit 1: HTML and CSS Prerequisite Overview

1.1: Introduction to HTML

HTML Basics

Practice: HTML Text Fundamentals

Working with Files: Folder Structure and Naming Conventions

Example in Action: Working with Basic HTML

Practice Review: Creating a Simple Webpage

1.2: Introduction to CSS

What is CSS?

Getting Started with CSS Rules

Example in Action: Working with Inline CSS

Practice: Develop a Webpage Using HTML and CSS

Study Session Review Video

PRDV401 Study Session 1

Unit 1 Assessment

Unit 1 Assessment

Unit 2: Introduction to JavaScript

2.1: JavaScript Overview

A Brief History of JavaScript

What is JavaScript?

Why JavaScript?

2.2: Getting Started

2.3: Adding JavaScript to a Webpage

JavaScript and HTML

Using the &lt;script&gt; Element to Link External Files

Example in Action: Incorporating Javascript in a Webpage

Practice: Run "Hello World"

2.4: Debugging JavaScript

What is Debugging?

Validating JavaScript

Example in Action: Install and Use JSHint in the Sublime Text

Study Session Review Video

PRDV401 Study Session 2

Unit 2 Assessment

Unit 2 Assessment

Unit 3: Values, Variables, and Statements

3.1: Data Types and Values

Introduction to DataTypes and Values

Example in Action: JavaScript Data Types

Practice: Immutable vs. Mutable in JavaScript

3.2: Variables and Strings

What is a Variable?

Identifier and Variable Names

Example In Action: String Variables

3.3: JavaScript Operators

Expressions and Operators Reference

More on JavaScript Operators

Assignment vs. Equality Operator

Expressions and Operators Reference (3.3)

Try It (3.3)

3.4: Introduction to JavaScript Statements

What is a Statement?

JavaScript Reserved Keywords

Block Statements

JavaScript Statement Syntax

Practice: Data Types and Arithmetic Operators

Practice Review: Using "var", "let", and "const" Statements

Keywords (3.4)

Try It (3.4)

Study Session Review Video

PRDV401 Study Session 3

Unit 3 Assessments

Unit 3 Assessment

Unit 4: Conditional Statements and Control Flow

4.1: Introduction to Conditional Statements

What is Control Flow?

4.2: Selection Control Statements

"if...else" Statements

Example in Action: "switch" Statement with a "break"

4.3: Looping Statements

"while" Statements

Example in Action: "for" Statement

"do...while" Statement

Practice Review: Fix the Switch Statement

Study Session Review Video

PRDV401 Study Session 4

Unit 4 Assessment

Unit 4 Assessment

Using the <script> Element to Link External Files