Summary  
This chapter covers how to define functions in Kotlin using the `fun` keyword, including specifying parameter lists, return types, default arguments, single‐expression bodies, and vararg parameters to create reusable code units.

General domain of usage  
Application development maintenance and modularization

A beginner-friendly video course designed to introduce you to the Kotlin programming language. Learn the essentials of Kotlin, from setting up your first project to understanding variables, data types, functions, control flow, and classes. Each chapter is structured as a video script with clear explanations, practical code examples, and quizzes to reinforce your learning.

Learn what Kotlin is, why it's popular, and how to write your first Kotlin program.

Explore how to declare variables, understand data types, and use type inference in Kotlin.

Learn how to define and use functions, and control the flow of your Kotlin programs with conditionals and loops.

Introduction to object-oriented programming in Kotlin: defining and using classes.

Defining Functions in Kotlin

Defining Functions in Kotlin