Explain to me why a function printSomething?

Question

Please explain in what cases it can be useful, and can it be replaced by other features (if, for.).

Answer 1

about if and for as I know)), and here is how to use the function printsomething do not know, please explain in detail in which case he might need.

Answer 2

By the way sorry if that error in the text (talking through an online translator).

Answer 3

I know English, but it is not enough to speak clearly on it (teaching), app the use of information because in my internet is not enough.