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. 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: Mar 29, 2026 · You now understand all 8 JavaScript data types and can identify what type any variable is. Your debugging time just got cut in half because you won't be guessing anymore.
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