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. Jan 19, 2026 · JavaScript data types are categorized into Primitive and Non-Primitive types Primitive Data Type Primitive data types in JavaScript represent simple, immutable values stored directly in memory, ensuring efficiency in both memory usage and performance. 1. Number The Number data type in JavaScript includes both integers and floating-point numbers. 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:
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