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Let's talk about data types in JavaScript.

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Let me show you what it means with the previous code.

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This is where we left.

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As you can see, we are declaring a variable and assign a value into it.

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And remember, programming is all about data.

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I mean, dealing with data, for example, uses or any kind of data.

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And we have different types of data that we can work with.

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And this is what we call data types.

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Meaning the type of data that we can use to store into a variable.

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And in programming, we have a couple of them.

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So let's look at some of the examples of data that we can use in JavaScript.

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And this is what we call data types.

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Let's look at the types of data in JavaScript and it has been categorized into two.

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One is called the primitive data type, and these are the data that cannot be changed once they are

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set and hold only one value at a time.

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So these data types cannot be changed.

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For example, if we assign a value to them and also they can hold only one value at a time.

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Back to this code.

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As you can see, each of these variables can hold a value at a time.

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Let's say we want to store complex data about a user.

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We want to keep track about the user's name, his age, country profile and other properties.

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This is not the best way to go.

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So let's look at the next type of data.

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And it's called non-primitive.

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And they are reference types or object that are more complex and can store multiple values as a single

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entity.

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So for this type of data, we can store multiple data.

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I will show you with code.

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So let's look at the types of data types and primitive.

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And one is called the strings.

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And in this code, that is line number five for the city.

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As you can see, we are saving a string.

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And a string is any value that has code around it.

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And we have what is called numbers, as you know, and Boolean values.

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When you say Boolean values, they are values that yield only two answers, whether true or false.

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For example, are you married?

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Yes or no?

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Are you a student?

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Yes or no?

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And we call this one as a boolean value.

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And the next type is called null, meaning that it has no value and we have undefined.

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Also, these two don't have any value in them, but it depends on some use cases where we need to use

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one of these.

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And lastly, this is a new feature that has been emerged and this is called Symbol.

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So I will show you examples of all of these primitive data types.

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Now let's move on.

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The non primitive.

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An example of this is called object simply means that we can store any kind of property in a single

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value.

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And this is what we call object.

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And we have what is called functions.

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And functions are the backbone of any programming languages.

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So we will talk about examples of all of these ones in this course.

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And lastly is about arrays.

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Don't worry about these ones.

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Arrays are used to store data in a single value, but they are index based.