In this tutorial, we will discuss how to create a simple calculator that can perform basic arithmetic operations such as addition, subtraction, multiplication, and division using a Python program.

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Program code for Simple Calculator in Python

# Simple Calculator in Python
def add(x, y):
return x + y

def subtract(x, y):
return x - y

def multiply(x, y):
return x * y

def divide(x, y):
if y == 0:
return "Error! Division by zero."
return x / y

print("Select operation:")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")

choice = input("Enter choice(1/2/3/4): ")

num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

if choice == '1':
print(f"{num1} + {num2} = {add(num1, num2)}")
elif choice == '2':
print(f"{num1} - {num2} = {subtract(num1, num2)}")
elif choice == '3':
print(f"{num1} * {num2} = {multiply(num1, num2)}")
elif choice == '4':
print(f"{num1} / {num2} = {divide(num1, num2)}")
else:
print("Invalid input")

Explanation

1. Function Definitions: The program defines four functions: add, subtract, multiply, and divide to perform the respective arithmetic operations.
2. Main Program: The program prompts the user to select an operation and enter two numbers. Based on the user’s choice, it performs the corresponding arithmetic operation and prints the result.

Output

• When you run the above program, it will prompt you to select an operation and enter two numbers.
• After entering the numbers, it will perform the selected arithmetic operation and print the result.

Conclusion

• In this tutorial, we learned how to create a simple calculator that can perform basic arithmetic operations using a Python program.
• Understanding this concept is essential for solving various mathematical problems and enhancing your programming skills.