Dart vs Kotlin: variables and constants

variables_constants.dart

void main() {
  // Mutable variable
  String explicitMutableVariable = "Hey!";
  var implicitMutableVariable = "Hey!";
  // Immutable variable (runtime constant)
  final String explicitImmutableVariable = "Hey!";
  final implicitImmutableVariable = "Hey!";
  // Compile time constant
  const String explicitConstant = "Hey!";
  const implicitConstant = "Hey!";
  // Nullable variable
  String? nullableVariable = null;
}

variables_constants.kt

fun main() {
    // Mutable variable
    var explicitMutableVariable : String = "Hey!"
    var implicitMutableVariable = "Hey!"
    // Immutable variable (runtime constant)
    val explicitImmutableVariable: String = "Hey!"
    val implicitImmutableVariable = "Hey!"
    // Nullable variable
    var nullableVariable: String? = null
}

// Compile time constant
const val EXPLICIT_CONSTANT: String = "Hey!"
const val IMPLICIT_CONSTANT = "Hey!"