JS Tutorials: What is Data Type in JavaScript | JS#007 #javascript #javascript_tutorial #datatypes

This is the 7th Continuation Video of the JavaScript Tutorial Series. The previous Two Videos are about Operators (Arithmetic and assignment Operators) and here we will talk about JS: Data Type. So the video will be interesting and full of JS fun so please watch it till the end.

Chapters
01:30 What is JavaScript Data Type?
04:25 How many Categories of Data Types?
04:35 Explaining Primitive Data Types.
06:30 Explaining Reference Data Types.
12:30 Explaining Number Data Types & Typography
14:55 Explaining Srting Data Types & Typography
17:00 Explaining Boolean Data Types & Typography
21:05 Explaining Undefined & Null Data Types & Typography
26:20 Explaining Symbol Data Types & Typography
29:00 Intro of BigInt Datatype

What is Data Type in JavaScript?
In JavaScript, a data type defines the type of data that a variable can hold. JavaScript has several built-in data types that can be categorized into two main categories: primitive and reference data types.
1. Primitive Data Types.
Stored by Value: Primitive data types are stored by value in memory. When you assign a primitive value to a variable, that variable directly holds the actual value.
Immutable: Primitive values are immutable, which means that once you create them, you cannot change their value. If you want to change a primitive value, you must create a new variable with a new value.
1. Number: Represents numeric values, both integers and floating-point numbers.
2. String: Represents textual data, enclosed in single ('') or double ("") quotes.
3. Boolean: Represents a binary value, either true or false.
4. Undefined: Represents a variable that has been declared but has not been assigned a value.
5. Null: Represents an intentional absence of any object value or no value at all.
6. Symbol (ES6): Represents a unique and immutable value often used as object property keys.

2. Reference Data Types
Stored by Reference: Reference data types are stored by reference in memory. When you assign a reference value (e.g., an object or an array) to a variable, the variable holds a reference to the memory location where the actual data is stored.
Mutable: Reference values are mutable, which means that you can change their content without changing the reference itself. This allows you to modify the underlying data.
1. Object: Represents a collection of key-value pairs (properties and methods).
2. Array: A special type of object used to store a list of values with numeric indexes.
3. Function: A reusable block of code that can be invoked with specific arguments.
4. Date: Represents date and time information.
5. RegExp (Regular Expression): Represents a pattern used for string matching.
6. DOM: It represents the HTML Document Object Model

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