What is the difference between HTTP GET and POST methods in the context of data transfer and their usage?

HTTP GET and POST methods differ in how they transmit data and their purpose:

• GET transmits data via the URL (in the query string), typically used for retrieving data. GET requests should be idempotent and not alter the server's state.
• POST transmits data in the request body, used for sending data to the server, such as creating or updating resources.

In the context of Flutter, when working with HTTP requests, GET is convenient for retrieving information, while POST is used for submitting forms or JSON data.

Example of a GET request in Flutter:

final response = await http.get(Uri.parse('https://api.example.com/data'));

Example of a POST request:

final response = await http.post(
  Uri.parse('https://api.example.com/data'),
  headers: {'Content-Type': 'application/json'},
  body: jsonEncode({'key': 'value'}),
);