A JavaScript variable can hold 8 types of data. 7 Primitive Data Types and 1 Object Data Type. The Object data type can hold many different object types.

Jul 8, 2025 · This article attempts to list the built-in data structures available in JavaScript and what properties they have. These can be used to build other data structures.

Jul 9, 2024 · There are eight basic data types in JavaScript. Here, we’ll cover them in general and in the next chapters we’ll talk about each of them in detail. We can put any type in a variable. For example, …

Jan 19, 2026 · JavaScript data types define what kind of values a variable can hold and how those values behave in a program. They determine how data is stored in memory and how operations like …

Aug 1, 2025 · As with almost every programming language, JavaScript treats various types of values differently. A string like “Hello world” is very different from a number like 42.

Mar 31, 2024 · Data types and structures Primitives are the simplest types of data in JavaScript. A primitive literal is a value, with no wrapper or properties of its own. Primitive literals are immutable, …

Data in JavaScript comes in various types like numbers, strings (which are just texts), booleans (true/false), arrays (lists of stuff), objects (bundles of related data), and other types to represent …

What does JavaScript’s type system look like? What is a Data Type? A data type is a set of values grouped together because certain operations apply to them. Every programming language seems to …

Sep 23, 2024 · JavaScript presents 8 data types, divided into two main categories: Primitive and Non-Primitive. Let’s quickly look at the different categories of data types in JavaScript. These accept and …

Jul 8, 2025 · This chapter discusses JavaScript's basic grammar, variable declarations, data types and literals.