Primitive data types

Now you know what variables are and why we need them in our code, it is time to look at the different types of values we can store in variables. Variables get a value assigned. And these values can be of different types. JavaScript is a loosely typed language. This means that JavaScript determines the type based on the value. The type does not need to be named explicitly. For example, if you declared a value of 5, JavaScript will automatically define it as a number type.

A distinction exists between primitive data types and other, more complex data types. In this chapter, we will cover the primitive type, which is a relatively simple data structure. Let's say for now that they just contain a value and have a type. JavaScript has seven primitives: String, Number, BigInt, Boolean, Symbol, undefined, and null. We'll discuss each of them in more detail below.

String

A string is used to store a text value. It is a sequence of characters. There...