Dart vs Kotlin: strings

strings.dart

void main() {
  String singleQuotes = 'Double quotes in "single" quotes';
  String doubleQuotes = "Single quotes in 'double' quotes";
  String multiLine = '''
  {
    "field": "value"
  }
  ''';
  String concat = 'Dart ' + 'is ' + 'fun!';
  String concatV2 = 'Dart ' 'is ' 'fun!';
  String answer = 'awersome';
  String valueInterpolation = 'Dart is $answer!';
  String resultInterpolation = 'Dart is ${getAnswer()}!';
}

String getAnswer() => 'awersome';

strings.kt

fun main() {
    var singleQuotes: String = "Double quotes in \"double\" quotes"
    var doubleQuotes: String = "Single quotes in 'double' quotes"
    var multiLine: String = """
    {
        "field": "value"
    }
    """
    var concat: String = "Dart " + "is " + "fun!"
    var answer = "awersome"
    var valueInterpolation: String = "Dart is $answer!"
    var resultInterpolation: String = "Dart is ${getAnswer()}!"
}

fun getAnswer() = "awersome"