Subroutines are not "named blocks of code" any more than they are facilitators of code reuse. Inline comments around a block of code also matches the concept of

Subroutines are not "named blocks of code" any more than they are facilitators of code reuse. Inline comments around a block of code also matches the concept of a named block of code. The point of subroutines is to gather the code that implements a particular concept, abstraction or algorithm in one place. Sometimes it coincides with code reuse or splitting your function into a bunch of smaller ones. The best way to tell if you are using subroutines effectively is if you can explain the effect of the subroutine without describing the implementation of it or (when splitting up a function) what it is trying to achieve for the function that calls it. If you can only describe it in relation to the function calling it, you fail. If you achieve code reuse and it's more than a line of code you get an automatic passing grade, it's just not necessarily a good grade.