Kotlin编程条件控制示例详解_Android

when (x) { 
    1 -> print("x == 1") 
    2 -> print("x == 2") 
    else -> { 
        print("x is neither 1 nor 2") 
    } 
}

// 一个枚举对象
enum class Bit { 
    ZERO, ONE 
} 

val numericValue = when (getRandomBit()) { 
    Bit.ZERO -> 0 
    Bit.ONE -> 1 
    // 'else' ... 
}

when (x) { 
    s.toInt() -> print("s encodes x") 
    else -> print("s does not encode x") 
}

when (x) { 
    in 1..10 -> print("x is in the range") 
    in validNumbers -> print("x is valid")        // 在集合中 
    !in 10..20 -> print("x is outside the range") // 不在范围内
    else -> print("none of the above") 
}

val c = if (condition) a else b

fun main() { 
    val x = 5 
    val y = 9 
    if (x in 1..8) { 
        println("x 在区间内") 
    } 
}

val max = if (a > b) { 
    print("Choose a") 
    a 
} else {
    print("Choose b") 
    b 
}