What does extern mean in a function declaration?

What does extern mean in a function declaration?

Extern is bassically significant only with data declarations. In the function declaration case, It can be used as a stylistic hint to indicate that the function's definition is probably in 
another source file, but there is no formal difference 
between 

	extern int A();

and 
	int A();

By:Umang
Date:2002-01-09 00:00:00

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