Simple Calculator Program

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 x / y else: return "Error! Division by zero."

def main(): print("Simple Calculator") print("Select operation:") print("1. Addition") print("2. Subtraction") print("3. Multiplication") print("4. Division")

# Get user input
choice = input("Enter choice (1/2/3/4): ")

if choice in ['1', '2', '3', '4']:
    num1 = float(input("Enter first number: "))
    num2 = float(input("Enter second number: "))

    if choice == '1':
        print(f"{num1} + {num2} = {add(num1, num2)}")

    elif choice == '2':
        print(f"{num1} - {num2} = {subtract(num1, num2)}")

    elif choice == '3':
        print(f"{num1} * {num2} = {multiply(num1, num2)}")

    elif choice == '4':
        print(f"{num1} / {num2} = {divide(num1, num2)}")
else:
    print("Invalid input! Please select a valid operation.")

if name == "main": main()