In this book, you will find a number of styles of text 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, Digital outputs are handled using the DigitalOutput class."

A block of code is set as follows:

private static DigitalOutput executionLed = new DigitalOutput (23, true);
private static DigitalOutput measurementLed = new DigitalOutput (24, false);
private static DigitalOutput errorLed = new DigitalOutput (25, false);
private static DigitalOutput networkLed = new DigitalOutput (18, false);

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

$ sudo apt-get udpate
$ sudo apt-get upgrade
$ sudo apt-get install mono-complete

New terms and important words such as "Internet of Things (IoT)" are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "To be able to configure the screen as we want, we enter the Settings menu, click on the Layout menu item, and select the No Menu 5x4 option ".