KOTLIN - Quick Start
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KOTLIN - Quick Start

Version: 2.0 - Date: 04.2021

About the Book


Kotlin is new modern programming language (similar to SwiftUI).

It is used for building Android Applications using Android Studio IDE and Jetpack Compose declarative UI language.

Book content

This book is collection of standalone tutorials.

Each tutorial contains minimum amount of code needed to explain specific functionality.

Each tutorial has minimum amount of supporting text making emphasis on the code example to do the explaining.

Exceptions are tutorials that explain main concepts behind the language or framework which require different approach.

About the Author

Ivor Online
Ivor Online


"Things are only as complicated as they are badly explained" 

Proper documentation is essential to avoid struggle and frustration when working with simple things that only seem complicated by not being properly documented and explained. 



"Working example is worth thousand words"

Just like the picture is worth thousand words the same goes for the working example. Documentation in the form of working examples is proved to be the fastest and the most effective way of transferring knowledge. Sometimes an example is all you need to get the things done. And if there are some accompanying comments that explain what is going on even better. This approach is used in this book. This results in fast learning and the ability to apply tutorials when you need them in the spirit of Just In Time Support. 

I wish you rapid learning!




Table of Contents

  • 1. Quick Start
    • 1.1 Create Application
      • 1.1.1 Online Compiler
      • 1.1.2 Android Studio Scratch File
  • 2. Main Concepts
    • 2.1 Data Types
      • 2.1.1 Literals
      • 2.1.2 Scalars
      • 2.1.3 Collections
    • 2.2 Variables
      • 2.2.1 Constants
      • 2.2.2 Variables
      • 2.2.3 Optionals
    • 2.3 Basic Syntax
      • 2.3.2 Print to Console
      • 2.3.3 Statements - Conditional
      • 2.3.4 Statements - Loop
      • 2.3.5 Statements - Jump
    • 2.4 Structures
      • 2.4.1 Objects
      • 2.4.2 Classes
      • 2.4.3 Fields
      • 2.4.4 Properties
      • 2.4.5 Interfaces
      • 2.4.6 Extensions
      • 2.4.7 Delegation
      • 2.4.8 Objects vs Classes
      • 2.4.9 Fields vs Properties
    • 2.5 Functions
      • 2.5.1 Function Declaration - Named
      • 2.5.2 Function Declaration - Anonymous
      • 2.5.3 Lambda Expressions
      • 2.5.4 Inline Functions
      • 2.5.5 Function vs Lambda vs Closure
  • 3. Summary
    • 3.1 Data Types
    • 3.2 Variables
    • 3.3 Basic Syntax
    • 3.4 Structures
    • 3.5 Functions

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