API vs Web Services

                                    --All Web services are APIs but not all
APIs are Web services.
--Web services might not contain all
the specifications and cannot perform
all the tasks that APIs would perform.
--A Web service uses only three styles 
of use: SOAP, REST and XML-RPC for
communication whereas API may be exposed 
to in multiple ways.
--A Web service always needs a network
to operate while APIs don’t need
a network for operation.

                                    1. All Web services are APIs but all APIs are not Web services.
2. Web services might not perform all the operations that an API
would perform.
3. A Web service uses only three styles of use: SOAP, REST and
XML-RPC for communication whereas API may use any style for
communication.
4. A Web service always needs a network for its operation whereas
an API doesn’t need a network for its operation.
5. An API facilitates interfacing directly with an application whereas
a Web service is a required a path.