Python Program to Create a Class which Performs Basic Calculator Operations

In this example, we will write a python program to create a basic calculator using class and objects. To better understand this example, make sure you have knowledge of the following tutorials:-

• Python Class and Objects
• Python Constructor
• Python Functions

Python Program to Create a Class which Performs Basic Calculator Operations

class Calculator:
    def __init__(self, a, b):
        self.a = a
        self.b = b

    def add(self):
        return self.a + self.b

    def mul(self):
        return self.a * self.b

    def div(self):
        return self.a / self.b

    def sub(self):
        return self.a - self.b


a = int(input("Enter first number: "))
b = int(input("Enter second number: "))
obj = Calculator(a, b)
choice = 1

while choice != 0:
    print("1. Add")
    print("2. Subtraction")
    print("3. Multiplication")
    print("4. Division")
    print("0. Exit")
    choice = int(input("Enter choice: "))
    if choice == 1:
        print("Result: ", obj.add())
    elif choice == 2:
        print("Result: ", obj.sub())
    elif choice == 3:
        print("Result: ", obj.mul())
    elif choice == 4:
        print("Result: ", round(obj.div(), 2))
    elif choice == 0:
        print("Exiting!")
    else:
        print("Invalid choice!!")

The output of the above program is:-