Jul-430 〈OFFICIAL • 2027〉

if choice == '1': print(num1, "+", num2, "=", add(num1, num2)) elif choice == '2': print(num1, "-", num2, "=", subtract(num1, num2)) elif choice == '3': print(num1, "*", num2, "=", multiply(num1, num2)) elif choice == '4': print(num1, "/", num2, "=", divide(num1, num2)) else: print("Invalid input")

calculator() This example demonstrates a very basic feature—a command-line calculator. Real-world features would likely be more complex and involve integration with existing systems, databases, and user interfaces. JUL-430

def calculator(): print("Select operation:") print("1. Add") print("2. Subtract") print("3. Multiply") print("4. Divide") choice = input("Enter choice(1/2/3/4): ") num1 = int(input("Enter first number: ")) num2 = int(input("Enter second number: ")) if choice == '1': print(num1, "+", num2, "=",

def divide(x, y): if y == 0: return "Error: Division by zero is not allowed" else: return x / y if choice == '1': print(num1