3 kotlin when 循環
相比於Java,Android中的while,kotlin的when更強大,可以直接給變量賦值
var level = 26
when (level) {
26, 27 -> {
println("android Oreo")
}
24, 25 -> println("android nougat")
23 -> {
println("android mars")
}
else -> {
println("android 5一下")
}
}
//when 可以賦值
var content33 = when (level) {
26, 27 -> "andoird oreo"
else -> "android 5yixia"
}
println("$content33")
// when is 判斷
var obj = null
when (obj) {
is Int -> println("obj是整形類型")
is String -> println("obj是字符串類型")
is Boolean -> println("obj是boolean")
else -> println("Unknown type")
}
//while do-while for
println("循環便利店。。。。 ")
var count = 5
while (count > 0) {
println("1:$count")
count--
}
//do -while
count = 5
do {
println("2 $count")
count--
} while (count > 0)
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