Lexical closures

 /// What is Closure ?

/// Ans: A Closure is function object that has access to variables in its lexical scope,
/// even when the function is used outside of its original scope

/// Example of Lexical Closure
// void main() {
//   var a = 0;
//   print("Main function = $a");
//
//   void outer() {                // This is Lexical scope
//     a = 5;
//     print("Outer function = $a");
//   }
//
//   outer();
// }

/// Another Example of Lexical Closure
var a = 0;

void main() {
  print("Main Function : $a");

  void outer() {
    a = 5;
    print("Outer Function : $a");
  }
  outer();
  demo();
}
void demo() {
  a = 20;
  print("Demo Function : $a");
}