【Kotlin】Kotlin 常用表达式 ( range 范围表达式 | when 条件表达式 | 字符串模板 )

fun main() {
    val number = 3
    val flag = number in 0..4
    println(flag)
}

fun main() {
    val number = 3
    val flag = number !in 0..4
    println(flag)
}

fun main() {
    val name = "Tom"
    val type = when(name) {
        "Tom" -> "猫"
        "Jerry" -> "老鼠"
        else -> "未知"
    }
    println("type : $type")
}

fun main() {
    val name = "Tom"
    val age = 18

    println("Name is $name, age $age, type is ${if(name == "Tom") "Cat" else "Mouse"}")
}

Name is Tom, age 18, type is Cat