Difference between test case and and use case

An use case is a list of actions or event steps, defining the interactions between a role (known in the Unified Modeling Language as an actor) and a system, to achieve a goal. Whereas a test case is a set of conditions or variables under which a tester will determine whether an application, software system or one of its features is working as it was originally established for it to do.

Use case describes us the overview of the software functions to reach the final destination. Test case demonstrates the test progress and the interaction between the software and the user.