JSON Data Types

JSON Data Types¶

Let us understand the data types that are used while representing objects in the form of JSON.

Here are the basic data types of JSON.

• Number
• String
• Boolean
• Array (Similar to Python list)
• Object (Nested JSON)
• null (empty value)

Here is an example for JSON representation of a Person object.

{
  "firstName": "John",
  "lastName": "Smith",
  "isAlive": true,
  "age": 27,
  "address": {
    "streetAddress": "21 2nd Street",
    "city": "New York",
    "state": "NY",
    "postalCode": "10021-3100"
  },
  "phoneNumbers": [
    {
      "type": "home",
      "number": "212 555-1234"
    },
    {
      "type": "office",
      "number": "646 555-4567"
    }
  ],
  "children": [],
  "spouse": null
}

Here are the details of data types of values in the above JSON.

• age is of type Number.
• isAlive is of type Boolean.
• spouse is of type null.
• address is of type Object.
• children is of type Array. In the example above, children array is empty.
• phoneNumbers is of type Array of Objects.