#  Whilesum.py Copyright (c) Kari Laitinen

#  http://www.naturalprogramming.com

#  2006-02-24  File created.
#  2022-12-16  Converted to Python 3.


integer_from_keyboard   =  -1
sum_of_integers         =   0

print( "\n This program calculates the sum of the integers" \
       "\n you type in from the keyboard. By entering a"    \
       "\n zero you can terminate the program. \n" )

while integer_from_keyboard  !=  0 :

   print( "  Current sum: %8d    Enter an integer: "  %  sum_of_integers, end="" )

   integer_from_keyboard  = int( input() )

   sum_of_integers  =  sum_of_integers + integer_from_keyboard 

print( "\n" )