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def divide(x, y): if y == 0: return "Error: Division by zero is not allowed" else: return x / y
def add(x, y): return x + y
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: ")) JUL-430
def multiply(x, y): return x * y
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. def divide(x, y): if y == 0: return
def subtract(x, y): return x - y
