Terminology – function definition, function

Is there a distinction between a function definition (not a declaration) and a function?
For me a function definition, is what gets defined by the programmer in the source code while the function it self is what we get after compilation.
Is that a valid distinction?


Sure, there’s a difference between a function and a function definition, otherwise we wouldn’t bother having both terms. Function isn’t just an abbreviation of function definition, they’re separate terms that are used in different contexts.

For instance:

The function definition for readInput() starts on line 34.


Input data are retrieved by the readInput() function.

It would be simply wrong to use function definition here. The function definition has a certain number of tokens, occurs at a specific place in the program and an be pointed out in a program listing. The function has a specific purpose, is active at specific times, and can be pointed out in a call stack or a memory segment.


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