Throughout this book, I have used the following typographic conventions:
Indicates a language construct such as a language statement, a constant, or an expression. Interface names appear in constant width. Lines of code also appear in constant width, as do classes and function and method prototypes.
Represents intrinsic and application-defined functions, the names of system elements such as directories and files, and Internet resources such as web documents. New terms are also italicized when they are first introduced.
Constant width italic
Indicates replaceable parameter names in prototypes or command syntax, and indicates variable and parameter names in body text.
Constant width boldface
Indicates user input, as well as emphasized code.