JSON Basics

JSON Data Types

String - text enclosed in single or double quatation marks

Numbers - integer, decimal ,positive , negetive

Boolean - true or false (no quatation marks)

Null - nothing  (no quatation marks)

Arrays - these are lists seperated by comma, inside square brackets ,can contain any data type
[3,4,55.4 , -8, 0, 56]
["red", "green", "blue"]
[54, "toast" , true ,null ,100]

Objects -JSON type dictionaries - means it contains as key - value pairs
dictionary enclosed by curly brackets
key and value seperated by colon
pairs seperated by comma
keys and values can be any data type
but most commonly string will be key

{"maths : "76, "science" : 80, "english" : 90}
{
"firstName" : "Indika" ,
"lastName" : "Senavirathne" ,
"age" : 35 ,
"employeed" : true
}


Nesting - Putting arrays and objects inside each other

[{
"type": "a",
"name": "Indika",
"data": [{
"name": "N1",
"ex": 3
}, {
"name": "N1",
"ex": 3
}]
}, {
"type": "a",
"name": "Indika",
"data": [{
"name": "N1",
"ex": 3
}, {
"name": "N1",
"ex": 3
}]
}, {
"type": "a",
"name": "Indika",
"data": [{
"name": "N1",
"ex": 3
}, {
"name": "N1",
"ex": 3
}]
}]

Some usefull links

https://jsonlint.com/
http://jsonviewer.stack.hu/
https://www.json-generator.com/