... of defining its first value and it needs a way of identifying the current value as well. We begin by defining a class, Progression, shown in Code Fragment 2. 2, which defines the standard ... as an instance variable, an integer, and it provides several operations for accessing this data, including methods for converting it into other number types, for converting it to a string of ... bills and coins as possible. Chapter Notes For a broad overview of developments in computer science and engineering, we refer the reader to The Computer Science and Engineering Handbook [ 92] ....