#Question 3
print("Hello") #output message to user
number = int(input("Please enter number (-1 to exit): ")) #user inputs any number or -1 to exit

count = 0

while (number>=0):
    number = int(input("Please enter number (-1 to exit): ")) #user inputs any number or -1 to exit
else:
    result = (number)
    print("Your total is {0}" .format(result)) #total of numbers added printed on screen
    count = count + 1

    if (number==-1): #user inputs -1 to
        print("Goodbye") #output message to user
    count = 0