What are the functions in C programming?

Functions in C are the basic building blocks of a C program. A function is a set of statements enclosed within curly brackets ({}) that take inputs, do the computation, and provide the resultant output. You can call a function multiple times, thereby allowing reusability and modularity in C programming.

There are Pre-defined Functions and User defined Functions. Pre-defined Function: These are Library functions such as Math Function, String Function, Single Char Function. When invoking a function from the libraries, there's no necessity to provide the entire formula; simply calling the function initiates its predefined procedure. User-defined Function: • Function without argument without return value • Function without argument with return value • Function with argument without return value • Function with argument with return value

Functions in C programming serve to encapsulate a block of code that performs a specific task, allowing for modular and reusable code. They enhance code readability and maintainability by breaking down complex tasks into smaller, manageable units. Functions accept input parameters, execute a series of statements, and may return a value. They facilitate code organization and promote the concept of abstraction, enabling programmers to focus on the task at hand without worrying about implementation details. Additionally, functions promote code reusability by allowing the same block of code to be called multiple times from different parts of the program. They play a vital role in structuring C programs, aiding in code optimization, debugging, and enhancing overall program efficiency and scalability.