Can you list the main HTTP methods and explain their use?

Main HTTP methods and their applications:

• GET — request to retrieve a resource. Used for reading data without changing the server's state.
• POST — send data to the server to create a new resource or perform an action.
• PUT — update an existing resource or create it if it does not exist (idempotent method).
• DELETE — delete a resource.
• PATCH — partially update a resource.
• HEAD — request headers of a resource without the body, used to check existence or metadata.

Example: working with REST API

• GET /users — get a list of users
• POST /users — create a new user
• PUT /users/1 — update user with id=1
• DELETE /users/1 — delete user with id=1

Understanding these methods is important for proper organization of client-server interaction.