Untitled

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

def calculator():
    print("Welcome to the Simple Calculator!")
    print("Operations:")
    print("1. Addition (+)")
    print("2. Subtraction (-)")
    print("3. Multiplication (*)")
    print("4. Division (/)")

    while True:
        # Get user input
        choice = input("Enter the operation (1/2/3/4) or 'q' to quit: ")

        if choice == 'q':
            print("Exiting the calculator. Goodbye!")
            break

        if choice in ['1', '2', '3', '4']:
            try:
                num1 = float(input("Enter the first number: "))
                num2 = float(input("Enter the second number: "))
            except ValueError:
                print("Invalid input! Please enter numbers.")
                continue

            if choice == '1':
                print(f"Result: {num1} + {num2} = {add(num1, num2)}")
            elif choice == '2':
                print(f"Result: {num1} - {num2} = {subtract(num1, num2)}")
            elif choice == '3':
                print(f"Result: {num1} * {num2} = {multiply(num1, num2)}")
            elif choice == '4':
                print(f"Result: {num1} / {num2} = {divide(num1, num2)}")
        else:
            print("Invalid choice! Please select a valid operation.")

# Run the calculator
calculator()