Constructor in Dart

A constructor is a special method in a class that is used to create and initialize objects. It runs automatically when an object is instantiated.

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Constructor in Dart

Types of Constructors in Dart

1. Default Constructor

If no constructor is explicitly defined, Dart provides a default constructor with no parameters.

class Car {
  String brand = 'Unknown';

void display() {
    print('Car brand: $brand');
  }
}

void main() {
  Car myCar = Car();
  myCar.display(); // Output: Car brand: Unknown
}

2. Parameterized Constructor

Allows passing values to initialize object properties.

class Car {
  String brand;
  int year;

Car(this.brand, this.year);
}

void main() {
  Car myCar = Car('Toyota', 2022);
  print(myCar.brand); // Output: Toyota
}

3. Named Constructors

Used when multiple ways of initializing an object are needed.