Kotlin Programming: The Big Nerd Ranch Guide

Kotlin is often encountered through Android, but learning the language itself means getting comfortable with its types, functions, null safety, and the way its features fit together. Kotlin Programming: The Big Nerd Ranch Guide takes that learning step by step, using examples and challenges to move from a first Kotlin application into the language’s wider toolkit.

Start with the language, not just the syntax

Josh Skeen and David Greenhalgh begin with the essentials: variables, constants, types, conditionals, and functions. From there, the guide explores lambdas and function types, strings and numbers, lists, sets, and maps. The sequence gives readers a foundation for understanding how Kotlin code is structured before moving into larger concepts.

Make sense of Kotlin’s distinctive features

Null safety and exceptions, classes and initialization, inheritance, interfaces, generics, and extensions all receive attention. Functional programming concepts and Java interoperability broaden the picture, helping readers see how Kotlin works both as a language in its own right and alongside the Java ecosystem.

Practice as you go

Challenges give readers a chance to apply ideas rather than simply read about them, while “For the More Curious” sections offer additional explanations for those who want to look beneath the surface. The book also introduces IntelliJ IDEA and includes a chapter on building an Android application with Kotlin, followed by an introduction to coroutines.

A first-edition Kotlin learning guide

This edition is written for Kotlin 1.2. It suits readers seeking a guided introduction to Kotlin fundamentals, as well as programmers who want a clearly organized account of the language’s features and Java connections. Because its examples and tooling discussion belong to that edition’s publication era, readers should keep its 2018 context in mind when working with newer development environments.