Because this book covers concepts that are independent of any particular programming language, it also includes little source code from any particular language. You’ll find occasional bits of source code used to contrast the syntaxes of different languages; but more often, this book uses pseudocode to demonstrate programming constructs. Pseudocode is an informal high-level “language” that looks sort of like a programming language, but isn’t really. It’s intended to describe a situation sufficiently so that you could implement the actual code in whatever language you are using.
For example, the following code shows a for loop in pseudocode, which repeats a particular operation a specific number of times:
variable> From 1 To 100 Do ...