2_DataTypesWithVariable.dart

void main(){

  // Numbers : Int with declare to var.
  // Data type int , variable a ,   value  = 10;

  // we are using to java , kotlin with Dart are same programming..  can using  to var, val;

  int i = 10 ;
  var result  = i;
  print("Integer value :  $result");

  // this is call for integer hex value..
  int hexValue = 0xEDABEE;



  // numbers double value Declare
  double d = 20.15;
  var e = 10.5;
  var res = d+e;
  print("Double value :  $res");


  //String value Declare
  String name = "This is first Programming is Dart.";
  var disName = "I am from learning Khulna.";
  print("String value: $name $disName");


  //Boolean value Declare

   bool b = true;
   print("Bollean value : $b");

   var bl = 10;
   var bn = 5;
   var rest = bl>bn;
   print("Boolean value :  $rest");



   // by default initialize vlaue  = null
  String cityName ;
  print("This is call for :  $cityName");


   // All datatypes are dart are Object..
   // Therefore there initial value is by default null


}