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Types of Data Types in JavaScript - JavaScript Tutorial 15
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Notes for You:: Types of Data Types in JavaScript - JavaScript Tutorial 15
- JavaScript Data types can be divided into three types:
I. Primitive Data Types: number, string, Boolean
II. Special Data Types: undefined, null
II. Composite Data Types: all objects
I. Primitive Data Types: Value Types
1. number:
- indicates both integer and real numbers
A. Integers:
- means whole numbers
Ex: 122, 2000, -400, etc
B. Real numbers:
- means float numbers, i.e. numbers containing floating point
Ex: 3.142, 9.8,-48.32, etc.
2. string: Textual data.
- indicates sequence of characters enclosed in double quotations or single quotations
Ex: "Hello World", 'Hello JavaScript', etc.
3. boolean:
- indicates logical or conditional result
- Boolean data type has two values true and false value.
II. Special Data Types: Default Values
1. undefined: indicates un-initialized.
- It is the default value of un-initialized variable.
- If we store undefined value in a variable its type will be set to undefined.
2. null: indicates the nothing.
- If we store null in a variable its type is set to object.
- Object type is also known as reference or pointer type,
- A variable of type object points or refers to another memory location; if it should not point to any memory location then assign a value null.
III. Composite Data Types: Reference types or Object types
- Instead of holding value they hold the address of another memory location.
Ex: Arrays, functions, RegExp, Date etc. are all example for Object types
=========================================
Follow the link for next video:
JavaScript Tutorial 16 - Type Casting in JavaScript | JavaScript Type Conversions
Follow the link for next video:
JavaScript Tutorial 14 - Data Types in JavaScript | typeof Operator in JavaScript
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- JavaScript Data types can be divided into three types:
I. Primitive Data Types: number, string, Boolean
II. Special Data Types: undefined, null
II. Composite Data Types: all objects
I. Primitive Data Types: Value Types
1. number:
- indicates both integer and real numbers
A. Integers:
- means whole numbers
Ex: 122, 2000, -400, etc
B. Real numbers:
- means float numbers, i.e. numbers containing floating point
Ex: 3.142, 9.8,-48.32, etc.
2. string: Textual data.
- indicates sequence of characters enclosed in double quotations or single quotations
Ex: "Hello World", 'Hello JavaScript', etc.
3. boolean:
- indicates logical or conditional result
- Boolean data type has two values true and false value.
II. Special Data Types: Default Values
1. undefined: indicates un-initialized.
- It is the default value of un-initialized variable.
- If we store undefined value in a variable its type will be set to undefined.
2. null: indicates the nothing.
- If we store null in a variable its type is set to object.
- Object type is also known as reference or pointer type,
- A variable of type object points or refers to another memory location; if it should not point to any memory location then assign a value null.
III. Composite Data Types: Reference types or Object types
- Instead of holding value they hold the address of another memory location.
Ex: Arrays, functions, RegExp, Date etc. are all example for Object types
=========================================
Follow the link for next video:
JavaScript Tutorial 16 - Type Casting in JavaScript | JavaScript Type Conversions
Follow the link for next video:
JavaScript Tutorial 14 - Data Types in JavaScript | typeof Operator in JavaScript
=========================================
JavaScript Tutorials Playlist:-
=========================================
Watch My Other Useful Tutorials:-
jQuery Tutorials Playlist:-
jQuery UI Tutorials Playlist:-
Bootstrap Tutorials Playlist:-
=========================================
► Subscribe to our YouTube channel:
► Visit our Website:
=========================================
Hash Tags:-
#ChidresTechTutorials #JavaScript #JavaScriptTutorial
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