Contenido del Curso

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

Challenge: Perform 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

¿Todo estuvo claro?

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Sección 2. Capítulo 8