fizzbuzz.kt

fun fizzBuzz(i: Int): String {
    return when {
        (i % 5 == 0 && i % 3 == 0) -> "FizzBuzz"
        (i % 3 == 0) -> "Fizz"
        (i % 5 == 0) -> "Buzz"
        else -> i.toString()
    }
}

fun main() {
    for (i in 1..101) {
        val ret = fizzBuzz(i)
        println(ret)
    }
}

fizzbuzz_class.kt

class FizzBuzz(var num: Int, var result: String) {
    fun check(n: Int): String {
        return if (n % this.num == 0) this.result
        else "$n"
    }
}


fun main() {
    var fizz = FizzBuzz(3, "Fizz")
    var buzz = FizzBuzz(5, "Buzz")
    for (i in 1..100) {
        println(fizz.check(i) + buzz.check(i))
    }
}

main.kt

fun main() {
    for (i in 1..101)
        if (i % 3 == 0 && i % 5 == 0) println("$i: FizzBuzz")
        else if (i % 3 == 0) println("$i: Fizz")
        else if (i % 5 == 0) println("$i: Buzz")
    for (i in 1..10)
        println("Hello, World")
    val array = arrayOf("a", "b", "c")
    for (i in array) println(i)
    for (i in 10 downTo 0 step 1) println(i)
    var map = mapOf("1" to "Tanaka", "2" to "sasaki")
    for ((k, v) in map) println("$k: $v")
    arrayOf(1, 2, 3, 4, 5).forEach {
        println(it)
    }
    var a: String? = "text message"
    a = null
    println(a?.length)
}