C Functions - W3Schools
www.w3schools.com › c › c_functionsC Functions Previous Next A function is a block of code which only runs when it is called. You can pass data, known as parameters, into a function. Functions are used to perform certain actions, and they are important for reusing code: Define the code once, and use it many times. Predefined Functions
C++ Functions - W3Schools
www.w3schools.com › cpp › cpp_functionsA function is a block of code which only runs when it is called. You can pass data, known as parameters, into a function. Functions are used to perform certain actions, and they are important for reusing code: Define the code once, and use it many times. Create a Function
C Functions - Programiz
www.programiz.com › c-programming › c-functionsThe standard library functions are built-in functions in C programming. These functions are defined in header files. For example, The printf () is a standard library function to send formatted output to the screen (display output on the screen). This function is defined in the stdio.h header file.