11.1. What Are Functions?
Functions are the structured or procedural programming way of organizing the logic in your programs. Large blocks of code can be neatly segregated into manageable chunks, and space is saved by putting oft-repeated code in functions as opposed to multiple copies everywhere—this also helps with consistency because changing the single copy means you do not have to hunt for and make changes to multiple copies of duplicated code. The basics of functions in Python are not much different from those of other languages with which you may be familiar. After a bit of review here in the early part of this chapter, we will focus on what else Python brings to the table.
Functions can appear in different ways… here is a sampling profile ...
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