Course Content

Introduction to JavaScript

1. JavaScript Fundamentals

About JavaScript Understanding JavaScript Syntax Challenge: Console Output in JavaScript Using Comments to Document Code Challenge: Write a Single-Line Comment Challenge: Write a Multi-Line Comment

2. Variables and Data Types in JavaScript

Understanding Variables in JavaScript Challenge: Define the Variable Using const for Constants Exploring JavaScript Data Types Working with null in JavaScript Introduction to Arrays Array Methods and Manipulation Challenge: Perform Array Operations

3. Performing Operations in JavaScript

Understanding Assignment Operators Mathematical Operations in JavaScript Assignment Operators in JavaScript Increment and Decrement Operators Challenge: Variable Operations Practice Comparison Operators in JavaScript Logical Operators Explained Challenge: Compare Variables in JavaScript Concatenating Strings in JavaScript Challenge: Build Sentences with JavaScript

4. Controlling Program Flow with Conditional Statements

Mastering if Statements in JavaScript Using else for Alternative Outcomes Applying else if for Multiple Conditions Challenge: Determine Sizes with Conditionals

5. Looping Through Data in JavaScript

Understanding the while Loop in JavaScript Using the do while Loop for Iteration Challenge: Print Numbers from 5 to 9 Mastering the for Loop in JavaScript Challenge: Console Tigers with Loops Breaking Out of Loops with break Skipping Iterations with continue Challenge: Stop and Skip in Loops

6. Functions in JavaScript

What Are Functions in JavaScript?Defining Functions in JavaScript Challenge: Write a Function – My Name Using Function Arguments Effectively Returning Values from Functions Challenge: Create a Sum Function Course Summary & Next Steps

Concatenating Strings in JavaScript

Let's explore some operations that you can perform with strings in JavaScript.

Concatenation

Concatenation is the process of combining two strings. This operation is achieved using the + operator:


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let wordOne = "Hello";
let wordTwo = "World";

console.log(wordOne + wordTwo);

You can see that concatenation creates a new string by combining two words.

Note

String concatenation does not automatically add spaces. You need to manually include spaces like string1 + " " + string2.

Let's create a nicely formatted string through concatenation:


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let wordOne = "Hello";
let wordTwo = "World";

console.log(wordOne + ", " + wordTwo + "!");

Concatenation with Assignment

The += operator allows you to add text to a string-type variable:


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let text = "Were";
text += "wolf";
text += "!";

console.log(text)

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Section 3. Chapter 9

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