In JavaScript, there are different types of things we can store in a variable.

One type is called a `number`, which is like counting how many toys you have.

Another type is called a `string`, which is like writing your name.

And then there's a type called `boolean`, which is like saying whether something is true or false.

It's important to know what type of thing you're storing in a variable because you can do different things with each type. For example:

- you can make calculations with numbers
- you can create a sentence with your name using a string
- you can check if something is true or false using a boolean

There are other types of data in JavaScript, but we'll learn about those later.

---

To declare a number, you can just write the number:

``` javascript
let myNumber = 5;
```

To declare a string, you need to put quotes around it:

``` javascript
let myString = "Hello";
let myName = 'John';
```

Notice that the quotes don't matter, as long as you use the same type of quotes on both sides.

To declare a boolean, you can just write `true` or `false`:

``` javascript
let isOpen = true;
let isClosed = false;
```

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In the code below we have 3 variables declared.
Define a value for each variable following the following types:

`myName` (string)
`myAge` (number)
`isOpen` (boolean)

The variable value is not important, just the type.

Variables Types