What is a “static” function in C?

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static functions are functions that are only visible to other functions in the same file (more precisely the same translation unit).

EDIT: For those who thought, that the author of the questions meant a ‘class method’: As the question is tagged C he means a plain old C function. For (C++/Java/…) class methods, static means that this method can be called on the class itself, no instance of that class necessary.

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