5 Functions
In Chapter 3, you learned that a variable is a name associated with a chunk of data. A function is a name associated with a chunk of code. You can pass information to a function. You can make the function execute code. You can make a function return information to you.
Functions are fundamental to programming, so there is a lot in this chapter – three new projects, a new tool, and many new ideas. Let’s get started with an exercise that will demonstrate what functions are good for.
When should I use a function?
Suppose you are writing a program to congratulate students for completing a Big Nerd Ranch course. Before worrying about retrieving the student list from a database or about printing certificates on spiffy ...
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