C Function Declaration

A declaration (prototipe) is a statement on a file that tells the compiler about the name of the function, the type of return, and the parameters without having to write the contents of the body. With a prototype, a function can be defined at the bottom of a file even if it can still be called from play. The prototype ends with a semicolon and must be consistent with the function definition. This practice makes the layout of the code more neat and prevents undetected parameter type errors.