4. Enhancing User Experience

A basic calculator is functional now, but let's make it a bit more user-friendly:

• Error Handling: We should handle potential errors, such as when the user enters a non-numeric value.

• Result Formatting: Display the result in a more readable format.

Let's implement these:

# ... previous code ...     if user_input in ('add', 'subtract', 'multiply', 'divide'):        try:            x = float(input("Enter first number: "))            y = float(input("Enter second number: "))             if user_input == 'add':                print(f"{x} + {y} = {add(x, y)}")            elif user_input == 'subtract':                print(f"{x} - {y} = {subtract(x, y)}")            elif user_input == 'multiply':                print(f"{x} × {y} = {multiply(x, y)}")            elif user_input == 'divide':                print(f"{x} ÷ {y} = {divide(x, y)}")         except ValueError:            print("Please enter a valid number.")     else:        print("Invalid Input") # ... rest of the code ...

We've wrapped our number input section with a try...except block to handle any ValueError exceptions. This ensures the program doesn't crash if a user accidentally (or intentionally) enters non-numeric values. We've also added formatted strings to display the result in a clearer manner.

With these enhancements, our basic calculator is now more resilient and user-friendly! As you work through this project, remember that it's not just about creating a tool that works; it's about creating a tool that provides a smooth experience for its users.