The Comprehensive Guide to Kotlin Programming : A Complete Reference Guide by Madison Giroux

Author:Madison Giroux
Language: eng
Format: epub
Tags: kotlin android, kotlin programming, kotlin book, kotlin language, kotlin reference, programming kotlin
Publisher: Madison Giroux
Published: 2025-02-13T00:00:00+00:00

Single-Expression Functions

S ingle-expression functions in Kotlin exemplify the language's commitment to conciseness and readability. These functions allow you to declare functions in a more succinct way when the entire function body can be expressed as a single expression. This feature not only reduces boilerplate code but also enhances clarity by focusing directly on the return value.

The Syntax of Single-Expression Functions

A single-expression function does away with the curly braces {} and the return keyword, instead using an equals sign = to directly specify the return value. The return type of single-expression functions can often be inferred by Kotlin, making it optional to explicitly declare it.

fun square (x: Int) = x * x

In this example, square is a single-expression function that takes an integer x and returns its square. Kotlin infers the return type as Int based on the operation performed on the input.

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