Simple Python Calculator

A beginner-friendly command-line calculator that accepts two user inputs, asks for an operation, and performs basic arithmetic using Python’s modern match-case control flow. Includes error handling for invalid inputs.

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Features

• Accepts two integer inputs.

• Supports:

  • Addition (+)
  • Subtraction (–)
  • Multiplication (*)
  • Division (/)

• Uses Python’s match statement for clean operation selection.

• Handles invalid numeric input via try–except.

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How It Works

1. Prompts the user for two numbers (a and b).

2. Shows available operations.

3. Reads the operator.

4. Executes the matching arithmetic block:

   match o:
       case "+":
           a + b

   (Full logic in the script.)

5. Catches invalid input and prints an error message.

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Usage

Run the script

python main.py

Example Interaction

Enter the first number: 8
Enter the second number: 3
what kind of operation do you want to perform...
Enter Operation: *
The result is: 24

Invalid Input Example

Enter the first number: hi
Enter a valid value of a and b

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Requirements

• Python 3.10+ (for match-case)

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Customization

You can extend the calculator by:

• Adding modulus (%)
• Adding exponent (**)
• Adding input validation loops
• Converting it into a GUI or CLI tool