What are the basic units of C language?

What is the basic unit of C language?

The basic unit of C language isfunction.

(Recommended learning:c language video tutorial)

All C language programs are composed of functions. Including the main function, the entry point of the program, and all other functions called by it.

A function consists of two parts: the description part of the function. Including function name, function type, function attributes, function parameter (formal parameter) name, formal parameter type.

For example:

int max(int a, int b) { return a > b ? a : b; }

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