Basics.dart

void main() {
  print("Preinting Statement ");

  print("New Update ");
  //    **************************   Print   **************************

  // print("Hello Dart ! ");
  // print(3 + 5);
  // print("3" + "2"); //concatenation of string
  // print("3" * 5); // write "3" 5 times

  //    **************************   Variables  **************************

  // Datatype variableName = value ;

  // int myInt = 10;
  // print(myInt);

  // //type variableName;  // Name Convention

  // // Change / transfer  the value of a variable

  // myInt = 15; //Transfer "myInt" from 10 to 15
  // print(myInt);

  //    ******** Final and Const Variables :

  // final date =
  //     DateTime.now(); // cant be change in the code , computed at run  time
  // final date1 = 10; // use for the compile time value to enhance performance

  // print(date); // print current date
  // print(date1); // const value known at compile time

  //********    Optional Variable : // Sound Null Safety

  // String? st1 = null;
  // // String? st12;

  // print(st1);

  // st1 = "Hello";

  // print(st1.length); // length is 5

  // st1 = null;

  // print(st1?.length ?? 0); // print 0 (if you want not to show 'null')
  // print(st1?.length ?? "No value in the string");// print instead of null

  //    **************************   Datatype  **************************

  // int a = 2;
  // int b = 7;

  // double c = 0.001;
  // String name = "Aqsam";
  // bool isage = false;

  // // "dynamic" you can use any datatype under dynamic datatype :

  // dynamic anyvar1 = 56;
  // dynamic anyvar2 = 0.98;
  // dynamic anyvar3 = "Aqsam";
  // dynamic anyvar4 = false;

  // print(a + b);
  // print(c);
  // print(name);
  // print(isage);

  // print(anyvar1);

  //    **************************   If Statemnt   **************************
}