Python Program to Add Two Numbers

Adding two numbers is one of the most fundamental tasks in programming. In Python, this can be achieved in various ways, from the simplest approach to more advanced methods that cater to different scenarios.

1. Basic Example

It is a basic example to add two numbers in Python.

a = 10
b = 20
sum = a + b
print(sum)

2. Using Simple Input and Output

The most basic way to add two numbers in Python is by taking input from the user and then printing the result.

a = int(input("Enter first number: "))
b = int(input("Enter second number: "))
sum = a + b
print("The sum is: ", sum)

3. Using Functions

Encapsulating the addition logic within a function improves code organization and reusability.

def add_numbers(a, b):
    return a + b

num1 = 10
num2 = 20
sum = add_numbers(num1, num2)
print("Sum: ", sum)

4. Using Classes

For a more structured approach, especially in larger applications, using classes can be beneficial.

class Calculator:
    def add(self, a, b):
        return a + b

calc = Calculator()
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
print("The sum is", calc.add(num1, num2))

Object-oriented programming (OOP) principles can be applied here to create a reusable Calculator class.

5. Using NumPy Library

For scientific computations, Python’s NumPy library can handle basic arithmetic operations efficiently.

import numpy as np

num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
sum = np.add(num1, num2)
print("The sum is", sum)

NumPy is powerful for numerical calculations and this shows its use for simple arithmetic as well.