Coding a rectangle class in Python

Level: Beginner

Your task for today is to create a Python class that models a rectangle. This is a great exercise to practice defining a class, initializing attributes, and writing simple methods — foundational skills for working with object-oriented code.

📝 Project Task

The program should:

• Define a class named Rectangle

• The class should have:

  • Two instance attributes: width and height (set via the constructor)

  • A method area() that returns the area of the rectangle

  • A method perimeter() that returns the perimeter of the rectangle

  • A method is_square() that returns True if width and height are equal

Bonus (optional):

• Add __str__() to print something like: Rectangle(4 x 5)

• Add input validation to ensure width and height are positive

This project introduces you to writing your own classes — a core concept in building reusable, modular, and real-world Python code.

📌 Expected Output

r1 = Rectangle(4, 5)
print(r1.area())        # 20
print(r1.perimeter())   # 18
print(r1.is_square())   # False

r2 = Rectangle(6, 6)
print(r2.is_square())   # True

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💻 Launch This Project in Colab

Open the interactive Google Colab notebook for today’s project — with full instructions, hints, and solutions.

Click the button below to start coding — no setup needed: