Web Reference: 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. Mar 13, 2026 ยท JavaScript supports different data types to handle numbers, text, and other kinds of information. Variables: Declared using var, let, and const to store data values. Primitive Data Types: Includes Number, String, Boolean, Null, Undefined, BigInt, and Symbol. Non-Primitive Data Types: Includes Object, Array, and Function used to store complex data. Jul 8, 2025 ยท 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.
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