Let's consider the **do-while** loop. This loop is similar to the **while** loop but differs.

# Syntax
The **do-while** loop initiates with the `do` keyword, encompasses the code block (`{}`), and concludes with the `while` keyword followed by the condition (`()`) without the code block:

```javascript
do {
  // code block
} while (condition);
```
Here's an example:

let a = 0;

do {
  console.log(a);
  a++;
} while (a <= 3 && a >= 1);

At the start, the variable `a` was set to `0`, but the condition `a >= 1` was assessed after the `a++` operation.

The code block within the `do` is always executed at least once:

// while loop
while (false) {
  console.log("while"); // not executed
}

// do-while loop
do {
  console.log("do-while"); // executed 1 time
} while (false);

> Note
>
> Including the **end-of-command** (`;`) after the `do` code block results in a `SyntaxError`.

The **do-while loop** is handy when you need to prompt the user for input at least once and continue until the user enters valid data or meets a specific condition.

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.

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.

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.

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.

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. 

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.

while	do-while
Executes code block after the conditional checking.	Executes code block before the conditional checking.

Introduction to JavaScript

do while

Syntax