Android Studio 4.2 Development Essentials - Kotlin Edition

15. An Overview of Kotlin Functions and Lambdas

Kotlin functions and lambdas are a vital part of writing well-structured and efficient code and provide a way to organize programs while avoiding code repetition. In this chapter we will look at how functions and lambdas are declared and used within Kotlin.

15.1 What is a Function?

A function is a named block of code that can be called upon to perform a specific task. It can be provided data on which to perform the task and is capable of returning results to the code that called it. For example, if a particular arithmetic calculation needs to be performed in a Kotlin program, the code to perform the arithmetic can be placed in a function. The function can be programmed to accept the values on which ...