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 "Cannot divide by zero" return x / y

def calculator(): print("Basic Calculator App") print("Available operations: +, -, *, /") while True: operator = input("Enter operator (+, -, *, /) or 'exit' to quit: ")

    if operator.lower() == 'exit':
        break

    if operator not in ('+', '-', '*', '/'):
        print("Invalid operator. Please try again.")
        continue

    num1 = float(input("Enter the first number: "))
    num2 = float(input("Enter the second number: "))

    if operator == '+':
        result = add(num1, num2)
    elif operator == '-':
        result = subtract(num1, num2)
    elif operator == '*':
        result = multiply(num1, num2)
    else:
        result = divide(num1, num2)

    print(f"Result: {result}\n")

if name == "main": calculator()