What are the functions in C programming?

In C programming, functions are essential building blocks that allow for modular and structured code. A function is a self-contained block of code designed to perform a specific task. It typically takes input parameters, processes them, and returns a result. Functions help break down complex programs into smaller, more manageable pieces, enhancing code organization and readability. They also promote code reuse, as a well-designed function can be called multiple times from different parts of a program. To declare a function in C, you specify the function's return type, name, and parameters (if any) in its signature. The function's body contains the actual code to execute when the function is called. Functions in C can be classified into standard library functions provided by the C Standard Library, user-defined functions created by the programmer, and those used for special purposes like main(), which serves as the entry point of a C program. Understanding how to define, call, and use functions is fundamental to effective C programming and contributes to writing modular and maintainable code. read less

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 fromthelibraries, 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 read less