program to create a getter function in class

class Person {
  // Properties
  String? firstName;
  String? lastName;

  // Constructor
  Person(this.firstName, this.lastName);

  // Getter
  String get fullName => "$firstName $lastName";
}

void main() {
  Person p = Person("John", "Doe");
  print(p.fullName);
}

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Another example of getter

class NoteBook {
  // Private properties
  String? _name;
  double? _prize;

  // Constructor
  NoteBook(this._name, this._prize);

  // Getter method to access private property _name
  String get name => this._name!;

  // Getter method to access private property _prize
  double get prize => this._prize!;
}

void main() {
  // Create an object of NoteBook class
  NoteBook nb = new NoteBook("Dell", 500);
  // Display the values of the object
  print(nb.name);
  print(nb.prize);
}

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Example of setter function

class NoteBook {
  // Private Properties
  String? _name;
  double? _prize;

  // Setter to update private property _name
  set name(String name) => this._name = name;

  // Setter to update private property _prize
  set prize(double prize) => this._prize = prize;

  // Method to display the values of the properties
  void display() {
    print("Name: ${_name}");
    print("Price: ${_prize}");
  }
}

void main() {
  // Create an object of NoteBook class
  NoteBook nb = new NoteBook();
  // setting values to the object using setter
  nb.name = "Dell";
  nb.prize = 500.00;
  // Display the values of the object
  nb.display();
}

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Example of getter and setter in class

class Student {
  // Private Properties
  String? _firstName;
  String? _lastName;
  int? _age;

  // Getter to get full name
  String get fullName => this._firstName! + " " + this._lastName!;

  // Getter to read private property _age
  int get age => this._age!;

  // Setter to update private property _firstName
  set firstName(String firstName) => this._firstName = firstName;

  // Setter to update private property _lastName
  set lastName(String lastName) => this._lastName = lastName;

  // Setter to update private property _age
  set age(int age) {
    if (age < 0) {
      throw new Exception("Age can't be less than 0");
    }
    this._age = age;
  }
}

void main() {
  // Create an object of Student class
  Student st = new Student();
  // setting values to the object using setter
  st.firstName = "John";
  st.lastName = "Doe";
  st.age = 20;
  // Display the values of the object
  print("Full Name: ${st.fullName}");
  print("Age: ${st.age}");
}

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Another example of getter and setter

class BankAccount {
  // Private Property
  double _balance = 0.0;

  // Getter to read private property _balance
  double get balance => this._balance;

  // Method to deposit money
  void deposit(double amount) {
    this._balance += amount;
  }

  // Method to withdraw money
  void withdraw(double amount) {
    if (this._balance >= amount) {
      this._balance -= amount;
    } else {
      throw new Exception("Insufficient Balance");
    }
  }
}

void main() {
  // Create an object of BankAccount class
  BankAccount account = new BankAccount();
  // Deposit money
  account.deposit(1000);
  // Display the balance
  print("Balance after deposit: ${account.balance}");
  // Withdraw money
  account.withdraw(500);
  // Display the balance
  print("Balance after withdraw: ${account.balance}");
}

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