Dart vs Kotlin: conditional expressions

conditional.dart

void main() {
  final score = 7;
  final result = score >= 5 ? "Passed" : "Failed";
  String message;
  switch (result) {
    case "Passed":
      message = "Congratulations!";
      break;
    case "Failed":
      message = "Keep trying!";
      break;
    default:
      message = "Do you know your result?";
  }
  print(message);
}

conditional.kt

fun main() {
    val score = 7
    val result = if(score >= 5) "Passed" else "Failed"
    val message = when (result) {
        "Passed" -> "Congratulations!"
        "Failed" -> "Keep trying!"
        else -> "Do you know your result?"
    }
    println(message)
}