Simple Calculator with Pyhton

🧮 Program Purpose

This Python program is a simple calculator that allows the user to:

✅ Choose an operation
✅ Enter two numbers
✅ See the calculated result

Supported operations:

• Addition
• Subtraction
• Multiplication
• Division

Step-by-Step Explanation:

1. Display the Menu

2. Get User Choice

3. Get Numbers from User

4. Perform Operation Based on Choice

Python checks the condition using if-elif-else.

• Addition
• Subtraction
• Multiplication
• Division
• Division by Zero Protection

5. Handle Invalid Input

Python Code :

print("Select operation:")

print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")
choice = input("Enter your choice (1/2/3/4): ")
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))
if choice == '1':
    print("Result =", num1 + num2)
elif choice == '2':
    print("Result =", num1 - num2)
elif choice == '3':
    print("Result =", num1 * num2)
elif choice == '4':
    if num2 != 0:
        print("Result =", num1 / num2)
    else:
        print("Error: Cannot divide by zero!")
else:
    print("Invalid choice")

 Example Run

Select operation:
1. Addition
2. Subtraction
3. Multiplication
4. Division

Enter your choice (1/2/3/4): 4
Enter first number: 10
Enter second number: 2
Result = 5.0
    

Key Concepts Used

✔ print() → display text
✔ input() → read user input
✔ float() → convert to decimal number
✔ if / elif / else → decision making
✔ nested if → check division safety

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 Why This Program is Good for Beginners

✅ teaches user input
✅ introduces conditions
✅ shows error handling
✅ demonstrates arithmetic operations