JavaScript Object Notation (JSON) – Introduction

Good Morning to all,
Today we discuss JSON related topic like introduction, advantage, syntax etc.
The light-weight text-data interchange format is a JavaScript Object Notation or short form is JSON.




It is used to store the information in an organized manner.
It helps to transmit data between web application and server. It is designed for human-readable data interchange.

Overview of JSON

• JSON stands for JavaScript Object Notation
• JSON is not a programming language
• The JSON has extended from JavaScript Scripting language.






• The light weight text data interchange is JSON
• the file name extrnsion is .json

Advantage of JSON

• It is alternative of XML.
• It is a lightweight data-interchange format.
• It is is language independent, That means, you can you JSON with any language.






• It is easy to use and understand.
• JSON is easy to read and write

JSON Syntax

All syntax of JSON is same like JavaScript syntax. JSON syntax is derived from JavaScript object notation syntax

• In JSON data is write in name/value pairs.
• Square brackets are used for store arrays.
• Every data in JSON is separated using commas.
• Curly braces are used for store objects.

JSON data – Name and a Value

In JSON data is write in name/value pairs, every name is written in double quotes ” ” . And each data is separated using commas.


"employeefirstName":"Pritty"


JSON Objects

JSON objects are written inside the curly braces like { }. Same like JavaScript JSON objects can contain multiple name/values pairs.


{"employeefirstName":"Pritty", "employeelastName":"Times"}


JSON Arrays

JSON arrays are written inside square brackets [ ]. Same like JavaScript, a JSON array can contain multiple objects.


"employees":[
{"employeefirstName":"Pritty", "employeelastName":"Times"},
{"employeefirstName":"Princy", "employeelastName":"Varghese"},
{"employeefirstName":"Prince", "employeelastName":"Thomas"}
]

JSON Datatype

TYPE	DESCRIPTION
Number	double- precision floating-point format in JavaScript
String	double-quoted Unicode with backslash escaping
Boolean	true or false
Array	an ordered sequence of values
Value	it can be a string, a number, true or false, null etc
Object	an un-ordered collection of key:value pairs
Whitespace	It can be used between any pair of tokens
null	empty

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