Without a proper understanding of functions, a software developer is limited in terms of their ability to create modular systems that are easy to reason about and maintain. In this course, Working with Functions in C, you will learn how to use functions in order to create programs and applications in C that are easy to test and easy to maintain. First, you’ll learn what functions are in C and why they are so important. Next, you’ll explore how to create your own user-defined functions in order to create modular, reusable code that is easy to maintain and test. Finally, you’ll take a deep-dive into the C standard library functions that are available. By the end of this course, you will have a deep understanding of both user-defined and standard library functions in C.