When should we use asserts in C?

Question

I am writing a function in C. As a matter of style, when is it good to use assert compared to returning an error code. Lets say the function is dividing two numbers. Should

Answer 1

An error code signals runtime behaviour. An assertion is a debugging tool that allows the developer to assert that their assumptions about the program logic are indeed true.

They're two completely different things with different applications.

Error codes are part of your normal program flow. Assertions are only for debugging, and if an assertion is triggered, that means that your program is not written correctly.