Representational State Transfer (REST) is a software architectural style that defines a set of constraints to be used for creating Web services that is the CRUD (create, retrieve, update, delete) operations. REST guidelines suggest using a specific HTTP method on a specific type of call made to the server.
HTTP defines a set of request methods to indicate the desired action to be performed for a given resource.Although they can also be nouns, these request methods are sometimes referred as HTTP verbs.Each of them implements a different semantic, but some common features are shared by a group of them: e.g. a request method can be safe, idempotent, or cacheable.
These methods are:
The GET method requests a representation of the specified resource. Requests using GETshould only retrieve data.
The POST method is used to submit an entity to the specified resource, often causing a change in state or side effects on the server.
The PUT method replaces all current representations of the target resource with the request payload.
The DELETE method deletes the specified resource
The PATCH method is used to apply partial modifications to a resource.
There is also a clear summary of restful API what we have just learnt