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

continue

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

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


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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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