Beginner JavaScript course: Learn variables, operators, conditionals, arrays, objects, loops, functions, and more. Unlock your coding potential for free!

JavaScript Essentials: Unleash Your Potential

Javascript

JavaScript is a scripting language you can use to make web pages interactive. It is one of the core technologies of the web, along with HTML and CSS, and is supported by all modern browsers. It is also a key skill to have before you move on to our web3 courses.

In this course, you'll learn fundamental programming concepts in JavaScript. You'll start with basic data structures like numbers and strings. Then you'll learn to work with arrays, objects, functions, loops, if/else statements, and more.

We are proud to leverage selections from freeCodeCamp's excellent Javascript curriculum for this course.

Scott Meyer is an entrepreneur, educator, writer and dad who works as the VP of Learning at Metacrafters. He is a leading practitioner at the intersection of education and web3 - known as ed3. His blog and podcast, ed3.gg, explores the future of education and the builders creating this future. As the Secretary of the IEEE Working Group on Learning Employment Records, he is helping to write the standards for the Ed3 future. He is helping Metacrafters bring the future of education to its students.

Scott

Chris is a Metacrafters Peer Mentor helping to teach the next generation of web3 developers.

Chris

Peer Mentor

Welcome to Metacrafters

Where We're Headed

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Comment Your JavaScript Code

Declare JavaScript Variables

Storing Values with the Assignment Operator

Assigning the Value of One Variable to Another

Initializing Variables with the Assignment Operator

Declare String Variables

Understanding Uninitialized Variables

Understanding Case Sensitivity in Variables

Explore Differences Between the var and let Keywords

Declare a Read-Only Variable with the const Keyword

Declaring and Initializing Variables

Add Two Numbers with JavaScript

Subtract One Number from Another with JavaScript

Multiply Two Numbers with JavaScript

Divide One Number by Another with JavaScript

Increment a Number with JavaScript

Decrement a Number with JavaScript

Create Decimal Numbers with JavaScript

Multiply Two Decimals with JavaScript

Divide One Decimal by Another with JavaScript

Finding a Remainder in JavaScript

Understanding Operators

Compound Assignment With Augmented Addition

Compound Assignment With Augmented Subtraction

Compound Assignment With Augmented Multiplication

Compound Assignment With Augmented Division

Compound Assignments

Escaping Literal Quotes in Strings

Quoting Strings with Single Quotes

Escape Sequences in Strings

Concatenating Strings with Plus Operator

Concatenating Strings with the Plus Equals Operator

Constructing Strings with Variables

Appending Variables to Strings

Find the Length of a String

Understand String Immutability

All About Strings

Understanding Boolean Values

Use Conditional Logic with If Statements

Comparison with the Equality Operator

Comparison with the Strict Equality Operator

Comparison with the Inequality Operator

Comparison with the Strict Inequality Operator

Comparison with the Greater Than Operator

Comparison with the Greater Than Or Equal To Operator

Comparison with the Less Than Operator

Comparison with the Less Than Or Equal To Operator

Comparisons with the Logical And Operator

Comparisons with the Logical Or Operator

Introducing Else Statements

Introducing Else If Statements

Logical Order in If Else Statements

Chaining If Else Statements

If Statements and Conditional Logic

Selecting from Many Options with Switch Statements

Adding a Default Option in Switch Statements

Multiple Identical Options in Switch Statements

The Switch Statement

Use the Conditional (Ternary) Operator

Use Multiple Conditional (Ternary) Operators

Ternary Operators

Javascript Variables and Operators

Store Multiple Values in one Variable using JavaScript Arrays

Nest one Array within Another Array

Access Array Data with Indexes

Modify Array Data With Indexes

Access Multi-Dimensional Arrays With Indexes

Introduction to Arrays

Manipulate Arrays With push Method

Manipulate Arrays With pop Method

Manipulate Arrays With shift Method

Manipulate Arrays With unshift Method

Manipulating Arrays

Build JavaScript Objects

Accessing Object Properties with Dot Notation

Accessing Object Properties with Bracket Notation

Updating Object Properties

Add New Properties to a JavaScript Object

Delete Properties from a JavaScript Object

JavaScript Objects

Javascript Arrays and Objects

Write Reusable JavaScript with Functions

Passing Values to Functions with Arguments

Return a Value from a Function with Return

Global Scope and Functions

Local Scope and Functions

Global vs. Local Scope in Functions

Assignment with a Returned Value

Returning Boolean Values from Functions

Return Early Pattern for Functions

JavaScript Functions

Iterate with JavaScript While Loops

Iterate with JavaScript For Loops

Iterate Odd Numbers With a For Loop

Count Backwards With a For Loop

Iterate Through an Array with a For Loop

Nesting For Loops

Iterate with JavaScript Do...While Loops

Use the parseInt Function

JavaScript Loops

Javascript Loops and Functions

Master the fundamentals of JavaScript with our free, basic course. Learn about variables, conditionals, arrays, objects, loops, and functions. Enroll today!

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