Key Points
The most important reason for creating a routine is to improve the intellectual manageability of a program, and you can create a routine for many other good reasons. Saving space is a minor reason; improved readability, reliability, and modifiability are better reasons.
Sometimes the operation that most benefits from being put into a routine of its own is a simple one.
You can classify routines into various kinds of cohesion, but you can make most routines functionally cohesive, which is best.
The name of a routine is an indication of its quality. If the name is bad and it's accurate, the routine might be poorly designed. If the name is bad and it's inaccurate, it's not telling you what the program does. Either way, a bad name means that ...
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