JavaScript supports several data types including numbers, strings, booleans, arrays, objects, null, and undefined. Numbers represent numeric values, strings represent text, booleans represent true or false values, arrays store multiple values in an ordered list, objects store key-value pairs, null represents the intentional absence of any object value, and undefined represents the absence of a defined value.

1. What Are JavaScript Data Types?
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JavaScript supports several data types including numbers, strings, booleans, arrays, objects,
null, and undefined. Numbers represent numeric values, strings represent text, booleans
represent true or false values, arrays store multiple values in an ordered list, objects store key-
value pairs, null represents the intentional absence of any object value, and undefined
represents the absence of a defined value.
JavaScript is a powerful programming language used to make web pages interactive. It is a text-
based scripting language that includes data types to identify the data stored in a variable during

2. execution. JavaScript is a dynamically typed language that does not require you to define the
data type before declaring a variable. In JavaScript, a variable can be assigned any value.
JavaScript data types are categorized into two parts i.e. primitive and non-primitive types. The
primitive data types include Number, String, Boolean, Null, Undefined, and Symbol. Non-
primitive types include Object, Array, and Function. The latest ECMAScript standard defines
eight data types out of which seven data types are Primitive (predefined) and one complex or
Non-Primitive.
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