Using various methods, any programming language can be used to make a CRUD app. CRUD stands for Create, Read, Update, Delete. For web APIs use HTTP requests are used to correspond to the CRUD verbs.

C for Create
HTTP Method : POST
POST creates a new resource.

R for Read
HTTP Method : GET
GET retrieves a resource.

U for Update
HTTP Method : PUT/PATCH
PUT/PATCH updates an existing resource.

D for Delete
HTTP Method : DELETE
DELETE deletes a resource.