Question 01

Write a Dart program that defines a class ‘Rectangle’. The class should have the following characteristics:

• Properties: Two properties, ‘length’ and ‘width’.

• Constructor: A constructor that initializes the properties ‘length’ and ‘width’.

• Area method: A method ‘area()’ that calculates the area of the rectangle.

• Perimeter method: A method ‘perimeter() that calculates the perimeter of the rectangle.

• Main function: In the main function, create an instance of the ‘Rectangle’ class with specific dimensions, and print the area and perimeter.

Question 02

Write a Dart program that defines a class ‘Student’. The class should have the following characteristics:

• Properties: Three properties: ‘name’, ‘age’, and ‘grades’ (a list of integers).

• Constructor: A constructor that initializes the ‘name’, ‘age’, and ‘grades’.

• Average grade method: A method ‘averageGrade()’ that calculates and returns the average of the student’s grades.

• Main function: In the main function, create an instance of the ‘Student’‘ class and print the student’s name, age, and average grade.

Question 03

Write a Dart program that defines a class ‘BankAccount’ with the following characteristics:

• Properties: Two properties, ‘accountNumber’ and ‘balance’.

• Constructor: A constructor that initializes the ‘accountNumber’ and ‘balance‘.

• Deposit method: A method ‘deposit(double amount)’ that adds the specified amount to the balance.

• Withdraw method: A method ‘withdraw(double amount)’ that subtracts the specified amount from the balance if there are sufficient funds. If the amount exceeds the balance, display an error message.

• Main function: In the main function, create an instance of the ‘BankAccount‘ class, make a deposit, make a withdrawal, and print the final balance.

Question 04

Write a Dart program that defines a class ‘Library’ to manage a collection of books. Each book is represented by a ‘Book’ class, which should contain the following properties:

• Properties:

  • ‘title’: The title of the book.

  • ‘author’: The author of the book.

  • ‘isbn’: The ISBN number of the book.

• The ‘Library‘ class should have a list ‘books‘ and the following methods:

  • ‘addBook(Book book)’: Adds a book to the library’s collection.

  • ‘removeBook(String isbn)’: Removes a book from the collection based on the ISBN.

  • ‘findBookByTitle(String title)’: Searches for a book by its title and returns the book details.

  • ‘listBooks()’: Lists all books in the library.

• In the ‘main()’ function, create a library, add several books, remove one, search for a book by title, and list all books.