Basic Functions

A brief rundown of functions in Kotlin

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THE CURRENT VERSION OF THIS ARTICLE IS PUBLISHED HERE.

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Tags: #FYI

This article is part of the Kotlin Primer, an opinionated guide to the Kotlin language, which is indented to help facilitate Kotlin adoption inside Java-centric organizations. It was originally written as an organizational learning resource for Etnetera a.s. and I would like to express my sincere gratitude for their support.

It is recommended to read the Introduction before moving on. Check out the Table of Contents for all articles.

Functions are fun and are therefore declared with the fun keyword, followed by the argument list.

Kotlin functions are much more fun than Java functions:

• Unlike Java, function declarations can live outside classes
• Unlike Java, types are specified after declarations. Visually, this nicely aligns function names into the same column.
• Unlike Java, arguments can have default values. Those values can be expressions.