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

In general, asserts are for the programmer (i.e. you) to find logic/programming errors before releasing the program to real users. Asserts should not be used for detecting runtime input errors -- use error codes for these.