5-datatype.dart

void main() {
  //datatype
  String name = "mehdi";
  String name1 = 'mehdi';
  int age = 22;
  double w = 3;
  bool isAlive = true;
  //the output will be 3.0
  print("$w");

  print(name1 + "is best then " + name1);
  print("$name is best then $name1");
}