count = 0
total = 0
average = 0

while True:
    user_input = input("Enter a number: ")
    count += 1
    average = total / count
    try:
        total += float(user_input)
    except ValueError:
        count -= 1
        print("Input needs to be a number.")
        pass
    if user_input == "":
        break
print("You entered: {} numbers".format(count))
print("Your numbers total to: {}".format(total))
print("The average of your numbers is: {}".format(average))