Introduction to JavaScript

Introduction to JavaScript

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1. Basic Concepts

Discover the fundamentals of JavaScript, including its purpose and syntax. Learn how to work with the console for output and use comments to organize and document your code. These foundational skills will prepare you for a deeper exploration of JavaScript's capabilities.

About JavaScript

Challenge: Console Output

Challenge: Single-line Comment

Challenge: Multi-line Comment

2. Variables and Data Types

Explore the building blocks of JavaScript by distinguishing between literals and variables. Understand the core data types, including `null` and arrays, and learn how to manipulate them using array methods.

Challenge: Defining the Variable

Data Types Overview

Challenge: Array Operations

3. Basic Operations

Learn how to manipulate JavaScript's data types through essential operations. Master assignment, mathematical operations, incrementing and decrementing, comparisons, logical operations, and string concatenation.

Mathematical Operations

Operations with Assignment

Increment and Decrement

Challenge: Variable Operations

Comparison Operations

Logical Operations

Challenge: Comparing Variables

String Concatenation

Challenge: Sentence Building

4. Conditional Statements

Discover how to control the flow of your programs with conditional statements. Master `if`, `else`, and `else if` to instruct JavaScript on making decisions and executing code based on different conditions.

Challenge: Determining Size

5. Loops

Streamline your code by mastering JavaScript's looping structures. Explore `while`, `do while`, and `for` loops, and learn how to control their behavior using `break` and `continue`. Unlock the power of loops to perform repetitive tasks efficiently.

Challenge: Printing Numbers from 5 to 9

Challenge: Tigers

Challenge: Stopping and Skipping

6. Functions

Discover the power of functions in JavaScript. Learn how to define functions, work with arguments, and use the `return` statement to create reusable and efficient code. Mastering functions will enhance your ability to write clean and modular programs.

What is a Function?

Challenge: My Name

Course Content

Introduction to JavaScript

Introduction to JavaScript

Challenge: Array Operations

Task

Create an array named myArray with the given data: ["Heine", 25, "Bob", 16].
Remove the last element, 16, from the array.
Add a new element with the value 21 to the end of the array.
Replace the second element with the value 27 using indexing.
Print the updated array to the console.


              12345
            
let ___ = ["Heine", 25, "Bob", 16];
myArray.___();
myArray.___(21);
myArray[___] = 27;
console.log(___);

The output should be :

Use the pop() method to remove an element from the end of an array.
Use the push() method to add an element to the end of an array.
Access the second element in the array using the index 1.
To log the array data to the console, use the console.log() with the array name.


              12345
            
let myArray = ["Heine", 25, "Bob", 16]; // Step 1
myArray.pop();         // Step 2
myArray.push(21);      // Step 3
myArray[1] = 27;       // Step 4
console.log(myArray);  // Step 5

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Section 2. Chapter 8

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