Python 3.5.1 (v3.5.1:37a07cee5969, Dec  6 2015, 01:54:25) [MSC v.1900 64 bit (AMD64)] on win32
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>>> while True:
	print("Enter 'add' to add numbers")
	print("Enter 'subtract' to subtract numbers")
	print("Enter 'divide' to divide numbers")
	print("Enter 'multiply' to multiply numbers")
	print("Enter 'quit' to quit numbers")

	user_input = input(": ")
	if user_input == "quit":
                break;
        elif user_input == "add":

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

                result = str(num1 + num2)
                print("The result is: " + result)

        elif user_input == "subtract":

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

                result = str(num1 - num2)
                print("The result is: " + result)

        elif user_input == "divide":

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

                if num2 == 0:
                        printf("Cannot Divide by zero"
                               break;

                result = str(num1 / num2)
                print("The result is: " + result)

        elif user_input == "muliply":

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

                result = str(num1 * num2)
                print("The result is: " + result)

        else:
                print("Unknown Error.")