3.13. Functions with Results

You might have noticed by now that some of the functions we are using, like the math functions, yield results. Other functions, like new_line, perform an action but don’t return a value. That raises some questions:

The answer to the third question is “yes, you can write functions that return values,” and we’ll do it next chapter. I will leave it up to you to answer the other two questions by trying them out.

Note

Any time you have a question about what is legal or illegal in C++, a good way to find out is to ask the compiler. It will let you answer your question by throwing an error… or not!

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