whenステートメント/Android

みればわかる人向けのサンプルコード

code:kotlin

when (variable) {

matches-value -> execute-this-code

matches-value -> execute-this-code

...

}

もっと具体的なサンプルコード

(Diceクラスは別の場所で定義)

code:kotlin

fun main() {

val myFirstDice = Dice(6)

val rollResult = myFirstDice.roll()

val luckyNumber = 4

when (rollResult) {

luckyNumber -> println("You won!")

1 -> println("So sorry! You rolled a 1. Try again!")

2 -> println("Sadly, you rolled a 2. Try again!")

3 -> println("Unfortunately, you rolled a 3. Try again!")

5 -> println("Don't cry! You rolled a 5. Try again!")

6 -> println("Apologies! You rolled a 6. Try again!")

}

}