In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "For instance, the LED object has an on() and off() function that turns the LED on and off."

A block of code is set as follows:

var myPin = new five.Pin(11);
myPin.on('high', function(){
console.log('pin 11 set to high!');
});

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

var myPin = new five.Pin(11);
myPin.on('high', function(){
console.log('pin 11 set to high!');
});

Any command-line input or output is written as follows:

> node LED-repl.js

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Now, we'll build a couple of projects that demonstrate how to use more advanced sensors: a photocell and a temperature sensor."