# [Tutor] using the loop function while another

Mark Lawrence breamoreboy at yahoo.co.uk
Tue Oct 9 22:12:02 CEST 2012

```On 09/10/2012 20:47, Amanda Colley wrote:
> Ok, here is my problem.  If a person has two  different people to order
> books for, then when using the loop option, How do you add the two seperate
> choices together for a  final total of books cost?
>
>   another='y'
>      while another=='y' or another=='Y':
>          choice()
>          another=input('Do you have another book to order for this student?
> '+\
>                        'Enter y for yes: ')
>
> def choice():
>      book=int(input('Enter the book chioce you want: ' +\
>                 'For Hardback Enter the number 1: ' +\
>                 'Paperback Enter the number 2: ' +\
>                 'Electronic Enter the number 3: '))
>      num=int(input('Enter how many you need: '))
>      cost=0
>      if book==1:
>          cost=79
>      elif book==2:
>          cost=49
>      elif book==3:
>          cost=19
>      b_total=float(cost*num)
>      print('Your book cost is \$ ',format(b_total,'.2f'))
>
>
>
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Create an empty list at the top of your loop.  Store your b_total in the
list inside the loop with the append method.  When the loop finishes use
the built-in sum function to get the final total.

--
Cheers.

Mark Lawrence.

```