Conventions Used in This Book

This book uses different typefaces to differentiate between code and regular English, and also to help you identify important concepts.

Text that you type and text that should appear on your screen is presented in monospace type.

 It will look like this to mimic the way text looks on your screen. 

Placeholders for variables and expressions appear in monospace italic font. You should replace the placeholder with the specific value it represents.

This arrow () at the beginning of a line of code means that a single line of code is too long to fit on the printed page. Continue typing all the characters after the as though they were part of the preceding line.

Note

A note represents interesting pieces of information relevant to the surrounding discussion.

Tip

A tip offers advice or teaches you an easier way to do a task or procedure.

Caution

A caution advises you about potential issues to avoid or take into account.

Headlined sidebars provide additional information and examples in more detail.