Data Types and Variables

 void main()

{

  int? b;     // Declaration of Nullable Variable using "?". Here b is nullable variable
  print(b);

  // Declaration Of Variable
  int a;  // Here "a" is Non-Nullable Variable.Every variable is Non-Nullable by default

  // ASSIGN
  a = 5;  //Initialization
  print(a);

  a = 8;
  print(a);

  BigInt longValue;
  longValue = BigInt.parse("73934120933820813848494544199");

  print(longValue);
  num percentage = 99.67;
  double per = 34.90;
  bool isLogin = false;

  isLogin = true;

  // Inline Declaration
  String name = "Raman";
  name = "Ramanujan";
  
  /// OUTPUT:
  /// null
  /// 5
  /// 8
  /// 73934120933820813848494544199
}