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Introduction to the Kotlin Type System

Explore the core concepts of the Kotlin type system, including how types differ from classes, the role of nullability, and smart type inference. Understand why Kotlin requires types and how they influence code structure for robust programming.

Introduction

The Kotlin type system is amazingly designed. Many features that look like special cases are just a natural consequence of how the type system is designed. For instance, thanks to the type system, in the example below:

  • The type of surname is String.

  • The type of age is Int.

  • We can use ...