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0.4. Conventions Used in This Book

0.4.2. Typesetting Conventions

The following typographic conventions are used in this book:

Used for file and directory names, email addresses, and URLs, as well as for new terms where they are defined.

Constant width
Used for code listings and for keywords, variables, functions, command options, parameters, class names, and HTML tags where they appear in the text.

Constant width bold
Used to mark lines of output in code listings and command lines to be typed by the user.

Constant width italic
Used as a general placeholder to indicate items that should be replaced by actual values in your own programs.

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