🎯 Kotlin's `when` Power User-Kotlin Control Flow Mastery

Example

val result = when (x) { 1 -> "One"; else -> "Other" }

Scenario

This function is particularly useful for scenarios where a variable needs to be checked against multiple constant values or conditions. It simplifies the code by eliminating the need for multiple if-else statements, providing a clear and concise way to handle various cases.

Example

when (x) { is Int -> print(x.inc()); is String -> print(x.toUpperCase()) }

Scenario

Ideal for scenarios where the type of a variable needs to be checked and different actions need to be taken based on that type. This feature leverages Kotlin's smart cast capability to safely cast variables within branches, making the code safer and more readable.

Example

when { x < 5 -> println("Less than 5"); x == 10 -> println("Exactly 10") }

Scenario

Useful in complex scenarios where conditions are not just dependent on a single variable but might involve multiple variables or complex expressions. This allows for more flexible and powerful decision-making within the code.

Example

when (mySealedClassInstance) { is SealedClassType1 -> handleType1(); is SealedClassType2 -> handleType2() }

Scenario

Particularly beneficial in scenarios involving sealed classes where each subclass represents a distinct case. This ensures exhaustive handling of all possible cases, enhancing type safety and making the code more robust.