Project 01: Calculator

📌 Project Overview

In this project, you will create a simple calculator that performs basic mathematical operations.

⚙️ Calculator Operations

Step 1: Take Input

First, take two numbers from the user.

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

Step 2: Choose an Operation

Ask the user which mathematical operation they want to perform.

operator = input("Enter operator (+, -, *, /): ")

Step 3: Perform Calculation

Use conditional statements to perform the selected operation.

if operator == "+":
    result = num1 + num2

elif operator == "-":
    result = num1 - num2

elif operator == "*":
    result = num1 * num2

elif operator == "/":
    result = num1 / num2

else:
    print("Invalid operator")

🚀 Complete Python Code

Now combine all the steps into one program.

print("===== Python Calculator =====")

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

operator = input("Enter operator (+, -, *, /): ")

if operator == "+":
    result = num1 + num2

elif operator == "-":
    result = num1 - num2

elif operator == "*":
    result = num1 * num2

elif operator == "/":

    if num2 != 0:
        result = num1 / num2
    else:
        print("Cannot divide by zero")
        result = None

else:
    print("Invalid operator")
    result = None


if result is not None:
    print("Result =", result)

🧮 Try the Calculator

Enter two numbers and choose an operation.

💻 Example Output

===== Python Calculator =====

Enter first number: 20
Enter second number: 5
Enter operator (+, -, *, /): *

Result = 100.0

🧠 Mini Challenge

Try improving the calculator by adding these features:

• Add modulus (%) operation
• Add power (**) operation
• Allow the user to perform multiple calculations
• Add a menu system