Conventions

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: "Let's look at the range data type, which allows us to define end-inclusive ranges."

A block of code is set as follows:

    val capitol = "England" to "London"
    println(capitol.first) // Prints: England
    println(capitol.second) // Prints: London

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

    ext.kotlin_version = '1.1.3'
    repositories {
        maven { url 'https://maven.google.com' }
        jcenter()
    }

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

sdk install kotlin

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: "Set name, package, and location for the new project. Remember to tick the Include Kotlin support option."

Warnings or important notes appear like this.

Tips and tricks appear like this.