Valid Data Types
In JSON, values must be one of the following data types:- a string
- a number
- an object (JSON object)
- an array
- a boolean
- null
JSON values cannot be one of the following data types:
- a function
- a date
- undefined
JSON Strings
Strings in JSON must be written in double quotes.Example
{ "name":"John" } JSON Numbers
Numbers in JSON must be an integer or a floating point.Example
{ "age":30 } JSON Objects
Values in JSON can be objects.Example
{
"employee":{ "name":"John", "age":30, "city":"New York" }
} Objects as values in JSON must follow the same rules as JSON objects.
JSON Arrays
Values in JSON can be arrays.Example
{
"employees":[ "John", "Anna", "Peter" ]
} JSON Booleans
Values in JSON can be true/false.Example
{ "sale":true } JSON null
Values in JSON can be null.Example
{ "middlename":null } 
