Literals are just values in the program. Any number or text in quotes is literal (`15`, `12.25`, `"Hi"`, `'Word'`). You can insert a literal into a variable for repeated use.

Variables play a crucial role in programming.

> Note
>
> **Variables** are named entities that store values that can be changed and utilized an unlimited number of times within a program.

To utilize a variable, it must first be defined. This is accomplished by selecting a variable **name** and using the `let` keyword:

```javascript
let x;
```

You can assign a value to a variable by using an assignment operator, such as `=`:

```javascript
let x;
x = 5;
```

Additionally, you can specify a value when defining a variable:

```javascript
let x = 13;
```

# Usage
There are literals: `15`, `11`, `"Hello"`, etc. Literals are some values that are used in code. Every literal should have a **data type** that will be described later.

You can use variables like literals in the code:

let word = "Variable";  // the variable value is the literal "Variable"

console.log("Literal");  // print literal
console.log(word);  // print variable value

When the interpreter (the program that executes the code) looks for a literal but finds a variable, it receives the value of that variable as a literal.

First, let's get acquainted with JavaScript and look at its syntax. In this section, you will get a basic familiarity with the JavaScript syntax to make it easier to learn in detail later on.

Now it's time to learn about the data types that JavaScript works with. We'll start by looking at the difference between literals and variables, and then delve into the various data types.

We have become familiar with the various data types. Now, let's learn how to work with them by learning the operations we can perform with each data type.

Next, we will learn how to control the flow of execution. It's a straightforward process: we can tell the interpreter exactly what to do under certain conditions.

Next, we will explore how to shorten code using repetitive looped actions. We will examine the types of loops available in JavaScript and learn how to work with them.

Finally, to be able to write simple programs, we need to learn about functions that can make our lives much easier. We will learn how to create and use our functions.

Usage

Define a variable: