What can I add to the calculator? Very interesting and that fantasy is over.

print("Выберите Что Хотите Сделать:") print("1 Сложение") print("2 Вычитание") print("3 Умножение") print("4 Деление") user = input("") if user == "1": number_one = float(input("Первое Число: ")) number_two = float(input("Второе Число:")) print(number_one + number_two) if user == "2": number_one = float(input("Первое Число: ")) number_two = float(input("Второе Число:")) print(number_one - number_two) if user == "3": number_one = float(input("Первое Число: ")) number_two = float(input("Второе Число:")) print(number_one * number_two) if user == "4": number_one = float(input("Первое Число: ")) number_two = float(input("Второе Число:")) print(number_one / number_two)

Closed due to the fact that it is necessary to reformulate the question so that it was possible to give an objectively correct answer by the participants andreymal , jfs , Kromster , Viktorov , cheops 26 Dec '17 at 5:42 .

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2 answers 2

Look at the usual accounting calculator.
- memorize
- learn from memory
- memory operation (+ -)
- interest
...

    Try to look at the sympy . There you can do this:

     >>> solve(x**2 - 2, x) [-√2, √2]