JSON Data Types
Valid Data Types
In JSON, values can only be certain types of data.
- a string
- a number
- an object (JSON object)
- an array
- a boolean
- null
JSON valuescannot belong to certain data types.
- a function
- a date
- undefined
JSON Strings
Text in JSON needs to be enclosed within double quotes.
Example
{"name":"John"}
JSON Numbers
JSON numbers must be whole numbers or decimal numbers.
Example
{"age":30}
JSON Objects
JSON values can be objects.
Example
{
"employee":{"name":"John", "age":30, "city":"New York"}
}
Values in JSON representing objects need to adhere to the JSON syntax.
JSON Arrays
JSON values can exist as arrays.
Example
{
"employees":["John", "Anna", "Peter"]
}
JSON Booleans
In JSON, values can either be true or false.
Example
{"sale":true}
JSON null
JSON values can be empty.
Example
{"middlename":null}
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