What is difference between use case and test case?

A use case is a description of a specific interaction between a user and a system. It describes how a user interacts with the system to achieve a specific goal. Use cases are typically used in the requirements gathering process to ensure that the system is designed to meet the needs of its users.

A test case, on the other hand, is a detailed description of how to test a specific feature or functionality of a system. Test cases are used by testers to verify that the system is functioning correctly and to identify any defects or issues. They are typically developed based on the use cases and other requirements documents.

In summary, a use case describes how a user interacts with the system, while a test case describes how to verify that the system is functioning correctly based on the use case and other requirements.