Mar 6, 2025 · Programming languages all have built-in data structures, but these often differ from one language to another. 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.

Built-in object types can be: objects, arrays, dates, maps, sets, intarrays, floatarrays, promises, and more. A JavaScript variable can hold any type of data. In programming, data types is an important concept. To be able to operate on variables, …

Aug 21, 2024 · These data types are broadly categorized into two groups: Primitive Data Types and Non-Primitive Data Types. Let us discuss it one by one. 1. Primitive Data Types. Primitive data types are the built-in data types provided by JavaScript. They represent single values and are not mutable. JavaScript supports the following primitive data types:

Nov 9, 2020 · JavaScript has a special operator called typeof which lets you get the type of any value. In this article, we will learn how typeof is used, along with a few gotchas to watch out for. Let's take a quick look at JavaScript data types before we dig into the typeof operator. In JavaScript, there are seven primitive types.

There are altogether 8 basic data types in JavaScript. Textual data. An integer or a floating-point number. An integer with arbitrary precision. Any of two values: true or false. A data type whose variable is not initialized. Denotes a null value. A data type whose instances are unique and immutable. Key-value pairs of collection of data.

JavaScript has 7 primitive data types: The typeof operator returns the type of a variable or an expression. In JavaScript, null is a primitive value. However, typeof returns "object". This is a well-known bug in JavaScript and has historical reasons. A complex data type can store multiple values and/or different data types together.

Mar 8, 2025 · In JavaScript, each value has a data type, defining its nature (e.g., Number, String, Boolean) and operations. Data types are categorized into Primitive (e.g., String, Number) and Non-Primitive (e.g., Objects, Arrays). 1. Number. The Number data type in JavaScript includes both integers and floating-point numbers.

JavaScript data types include primitive types: undefined, null, string, boolean, number, BigInt, and symbol, and the complex type object.

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, a variable can at one moment be a string and then store a number:

May 5, 2021 · Data types are used to classify eight fundamental values used for programming in JavaScript, including primitive and object types. JavaScript uses seven primitive data types that are listed in the table below: Any number, including numbers with decimals: 1, -2, 99, 3.14.