Best Kotlin Programming Tools to Buy in October 2025

Thriving in Android Development Using Kotlin: A project-based guide to using the latest Android features for developing production-grade apps



Head First Android Development: A Learner's Guide to Building Android Apps with Kotlin



Android UI Development with Jetpack Compose: Bring declarative and native UI to life quickly and easily on Android using Jetpack Compose and Kotlin



Modern Android 13 Development Cookbook: Over 70 recipes to solve Android development issues and create better apps with Kotlin and Jetpack Compose



Kotlin Programming: The Big Nerd Ranch Guide (Big Nerd Ranch Guides)



Learn Android Studio 3 with Kotlin: Efficient Android App Development



Beginning Kotlin: Build Applications with Better Code, Productivity, and Performance



Reactive Programming in Kotlin: Design and build non-blocking, asynchronous Kotlin applications with RXKotlin, Reactor-Kotlin, Android, and Spring



Extending Android Builds: Pragmatic Gradle and AGP Skills with Kotlin


To change a number to a negative number in Kotlin, you can simply multiply the number by -1. For example, if you have a variable num
with a value of 5 and you want to make it -5, you can do so by writing num = num * -1
. This will change the number to its negative equivalent.
How to utilize Kotlin's built-in functionality to change a number to negative?
You can utilize Kotlin's built-in functionality by using the unaryMinus()
operator to change a number to negative. Here's an example code snippet:
val number = 10 val negativeNumber = -number // using unaryMinus() operator
println("Original Number: $number") // Output: 10 println("Negative Number: $negativeNumber") // Output: -10
In this example, the unaryMinus()
operator is used to change the number 10
to its negative counterpart -10
.
What is the recommended approach for changing a number to negative in Kotlin?
One recommended approach for changing a number to negative in Kotlin is to multiply it by -1. Here is an example:
val number = 5 val negativeNumber = number * -1 println(negativeNumber) // Output: -5
This method is simple and efficient for changing a number to negative in Kotlin.
What is the syntax for changing a number to a negative number in Kotlin?
To change a number to a negative number in Kotlin, you can simply multiply the number by -1. Here is an example:
val number = 5 val negativeNumber = number * -1
println(negativeNumber) // Output: -5