Introduction to JavaScript

Introduction to JavaScript

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1. Basic Concepts

Our first section will introduce you to JavaScript and explore its syntax. This initial step will give you a fundamental understanding of JavaScript's syntax, setting the stage for more in-depth learning in subsequent sections.

About JavaScript

Challenge: Console Output

Challenge: Single-line Comment

Challenge: Multi-line Comment

2. Variables and Data Types

We'll dive into the essential data types that JavaScript operates with. We'll begin by distinguishing between literals and variables and then explore the diverse range of data types used in JavaScript. This knowledge will form a solid foundation for your journey into JavaScript.

Challenge: Defining the Variable

Data Types Overview

Challenge: Array Operations

3. Basic Operations

We're acquainted with the various data types. It's time to roll up our sleeves and learn how to manipulate them. In this third section, we'll explore the operations that can be performed with each data type, equipping you with practical skills to work effectively with JavaScript's data structures.

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

Delve into the art of controlling the flow of execution in JavaScript. It's a powerful skill that enables us to instruct the interpreter precisely on how to behave under various conditions. You'll gain the ability to orchestrate your code's behavior.

Challenge: Determining Size

5. Loops

Uncover the code optimization through the use of loops. Loops allow us to streamline our code by performing repetitive actions efficiently. We'll delve into JavaScript's different types of loops and discover how to wield their power effectively.

Challenge: Printing Numbers from 5 to 9

Challenge: Tigers

continue

Challenge: Stopping and Skipping

6. Functions

Unlock the potential of functions as essential tools for crafting simple yet powerful programs. You'll master creating and utilizing functions, empowering you to simplify your coding endeavors and enhance your problem-solving skills.

What is a Function?

Challenge: My Name

Conteúdo do Curso

Introduction to JavaScript

Introduction to JavaScript

continue

The continue keyword allows you to skip the remaining code within a loop for the current iteration and proceed to the next iteration.

Example 1: Skipping Early Iterations


              1234567
            
for (let i = 0; i < 10; i++) {
  if (i < 5) {
    continue;
  }

  console.log("i =", i);
}

In this example, the continue keyword is used to skip iterations of the loop where i is less than 5. As a result, only iterations with i values in the range [5, 9] execute the code inside the loop.

Example 2: Skipping a Specific Iteration


              123456789
            
for (let i = 1; i <= 5; i++) {
  console.log("Iteration started:", i);  

  if (i == 3) {
    continue;  // Skip the end of the 3rd iteration
  }

  console.log("- Iteration ended:", i);
}

Here, the continue statement is used to skip the end of the 3rd iteration, resulting in the output of "Iteration started" and "Iteration ended" messages for all iterations except the one where i equals 3.

Note
The continue keyword works similarly to break, but instead of terminating the loop entirely, it only skips the current iteration and proceeds with the next one. This behavior can be handy for fine-grained control of loop execution.

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Seção 5. Capítulo 7

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