Valid Data Types in JSON
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 JSON syntax.
JSON Arrays
Values in JSON can be arrays.
Example:
{ "employees": ["John", "Anna", "Peter"]}
JSON Booleans
Values in JSON can be true or false.
Example:
{"sale": true}
JSON null
Values in JSON can be null.
Example:
{"middlename": null}
