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. Understand the different types of JavaScript errors, for example, syntax errors and logic errors. Learn about the common types of JavaScript error messages and what they mean. Data types basically specify what kind of data can be stored and manipulated within a program. There are six basic data types in JavaScript which can be divided into three main categories: primitive (or primary), composite (or reference), and special data types.
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