calculator_app.py

# Calculator option

# add option
def add(n1, n2):
    return n1 + n2

# subtract option


def subtract(n1, n2):
    return n1 - n2

# multiple option


def multiply(n1, n2):
    return n1 * n2

# divide option


def divide(n1, n2):
    return n1 / n2


# all operation symbloes
operations = {
    "+": add,
    "-": subtract,
    "*": multiply,
    "/": divide
}

# calculator function


def calculator():
    num1 = float(input("What's the first number? \n=> "))
    for symbol in operations:
        print(symbol)
    should_continue = True

    while should_continue:
        operation_symbol = input("Pick an operation: ")
        num2 = float(input("What's the next number? \n=> "))
        calculation_function = operations[operation_symbol]
        answer = calculation_function(num1, num2)

        print(f"{num1} {operation_symbol} {num2} = {answer} ")

        if input(f"Type 'y' to continue calculating with {answer}, or type 'n' to start a new calculation:  ") == "y":
            num1 = answer
        else:
            should_continue = False
            calculator()