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Pascal had an explicit distinction: functions are procedures which return a result.

K&R C didn't bother with procedures: everything is a function, and if you omit return at the end, it will return garbage to the caller

Later, ANSI C added the "void" type and (optional) function prototypes, making this footgun somewhat less dangerous.

Support for declaring and defining functions without a full prototype will be finally removed in C23:
https://en.cppreference.com/w/c/23

@srevinsaju #programming