To help you get the most from the text and keep track of what's happening, we used a number of conventions throughout the book.
TRY IT OUT
Try It Out is an exercise you should work through, following the text in the book.
How It Works
After each Try It Out, the code you typed will be explained in detail.
Boxes with a warning icon like this one hold important, not-to-be-forgotten information that is directly relevant to the surrounding text.
The pencil icon indicates notes, tips, hints, tricks, or asides to the current discussion.
As for styles in the text:
We present code in two different ways:
We use a monofont type with no highlighting for most code examples. We use bold to emphasize code that is particularly important in the present context or to show changes from a previous code snippet.