Calculator.py

import math


while True:
    Op = input("Please Select one option:(Sum,Minus,Mult,Div,Pow,Radical,exit)").strip().lower()

    if Op in ["sum","minus","mult","div"]:
        Number1 = float (input("Please Enter your number1: "))
        Number2 = float (input("Please Enter your number2: "))
        
        if Op == "sum":
            print(Number1 + Number2)
        elif Op == "minus":
            print(Number1 - Number2)
        elif Op == "mult":
            print(Number1 * Number2)
        elif Op == "div":
            if Number2 == 0:
                print("cannot divide by zero!")
            else:
                print(Number1/Number2)

    

    elif Op == "pow":
        Number1 = float(input("Please Enter your number1: "))
        ex = float(input("Please Enter the exponent: "))
        print(math.pow(Number1, ex))

    elif Op == "radical":
        Number1 = float(input("Please Enter your number1: "))
        if Number1 < 0:
            print("Cannot take square root of negative number!")
        else:
            print(math.sqrt(Number1))

    if Op == "exit":
        print("GoodBye!")
        break