What are the basic data types in js

The basic data types of JavaScript are: numbers, strings, Boolean values, undefined, null, objects and Symbol. Among them, numbers represent numerical values, strings represent character sequences, Boolean values ​​represent true or false, undefined represents uninitialized or non-existent variables, null represents empty values, objects are the base classes of complex data structures, and Symbol represents the only immutable value. .

Basic data types of JavaScript

JavaScript provides a variety of basic data types for storage and representation Different types of values. These data types include:

1. Number

• represents an integer or floating point number.
• can be expressed in decimal, hexadecimal or octal.
• For example: 10, 3.1415, 0xFF

2. String

• represents a string of Unicode characters.
• Can be expressed using single quotes ('), double quotes (") or backticks (`).
• For example: 'Hello World', "JavaScript", `$ The age of {name} is ${age}

#3. Boolean value

represents true or false #.
• ## is used to represent logical conditions.
• For example: true, false
• ##4. undefined

## represents An uninitialized or non-existent variable.

For example: let x; console.log(x); // Output undefined

• ##5. null

Indicates a null value. Used when the value of a variable is unknown or empty. For example: let y = null;

• 6. Object
• The base class for all other JavaScript data types

Used to represent complex data structures such as arrays, functions, and Object. For example: array [1, 2, 3], function function myFunc() {}, object { name: 'John Doe' }

• ##7. Symbol
• ##Introduced since ES2015.
• is used to represent unique and immutable values.

is mainly used for object properties to avoid property names. Conflict. For example: const mySymbol = Symbol('mySymbol');

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