Chapter 10. Modules
Every program has a shape. On a small scale, this shape is determined by its division into functions and the blocks inside those functions. Programmers have a lot of freedom in the way they structure their programs. Shape follows more from the taste of the programmer than from the program’s intended functionality.
When looking at a larger program in its entirety, individual functions start to blend into the background. Such a program can be made more readable if we have a larger unit of organization.