calculator1

simple calculator 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): return x / y

print("Select operation.") print("1.Add") print("2.Subtract") print("3.Multiply") print("4.Divide")

while True:

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(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))


    next_calculation = input("Let's do next calculation? (yes/no): ")
    if next_calculation == "no":
        break

else:
    print("Invalid output")