JSON (JavaScript Object Notation) is an open standard format for storing and transporting data. It is language independent and uses human-readable text to transmit data objects consisting of attribute-value pairs and arrays. JSON is lightweight, self-describing and easy to understand. It is derived from JavaScript and uses {} curly braces for objects and [] square brackets for arrays.

1. JSON

2. What is JSON?
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JSON stands for JavaScript Object Notation
JSON is an open standard file format for storing and transporting data.
JSON is a lightweight data-interchange format
JSON is "self-describing" and easy to understand
JSON is language independent
The file type for JSON files is ".json"

3. Valid Data Types
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In JSON, values must be one of the following data types:
a string
a number
an object (JSON object)
an array
a boolean
null

4. JSON Syntax Rules
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JSON syntax is derived from JavaScript object notation
syntax rules:
Data in the form of name/value pairs
Begins with {
Ends with }
Name / value pairs are separated by commas
Curly braces hold objects { }
Square brackets hold arrays [ ]

5. Example
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<script>
var jsonobject ={
“firstname” : “Naveen”,
“lastname” : “Kharwal”,
“age” : 22
“ramdom_nums” : [21,22,23,24,25]
}
documents.write(jsonobject)
</script>

6. JSON vs XML
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Both JSON and XML can be used to receive data from a web server.
JSON is Like XML Because
Both JSON and XML are "self describing" (human readable)
Both JSON and XML are hierarchical (values within values)
Both JSON and XML can be parsed and used by lots of programming languages
Both JSON and XML can be fetched with an XMLHttpRequest

7. JSON is Unlike XML Because
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JSON is lighter and faster than XML
JSON doesn't use end tag
JSON is shorter
JSON is quicker to read and write
JSON can use arrays