What are the types of data types in js

There are 12 data types in JavaScript: 6 primitive types (undefined, null, boolean, number, string, BigInt, Symbol) and 3 reference types (object, array, function). In addition, there are 4 special values ​​(NaN, Infinity, -Infinity) and 3 special data types (void, const, let).

Data types in JavaScript

JavaScript is a dynamically typed language, which means that variables can be when changing its data type. There are the following data types in JavaScript:

Primitive data types

• undefined: represents an uninitialized variable or property.
• null: indicates a value that clearly does not exist.
• boolean: represents true or false.
• number: represents a number.
• string: represents a string.
• BigInt: Represents an integer larger than the Number data type.
• Symbol: represents a unique and immutable value.

Reference data type

• object: Represents a non-primitive value containing a key-value pair.
• array: represents an ordered collection containing elements.
• function: represents a code block that can be called.
• Date: represents a date and time.

Special data types

• NaN: represents a non-numeric value.
• Infinity: represents positive infinity.
• -Infinity: represents negative infinity.

Others

In addition to these data types, there are the following special values:

• void:Indicates a function call that does not return any value.
• const: represents a constant whose value cannot be changed.
• let: represents a variable whose value can be changed within the code block.
• var: represents a variable whose value can be changed in the global or local scope.

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