#  Letters.py (c) Kari Laitinen

#  http://www.naturalprogramming.com

#  2006-04-12  File created.
#  2022-12-16  Converted to Python 3.

#  'A' is a string literal in Python. The statement
#  letter_to_print  =  'A' would make letter_to_print reference
#  a string, and it is somewhat difficult to increment the
#  character code inside the string. For this reason, this program 
#  is written so that letter_to_print is assigned an int value.
#  (See program pythonfiles3\Uplow.py for more information.)

#  With format specifier %c it is possible to print the character
#  that is represented by an integer. %c can also print a single-
#  character string, i.e., a kind of 'char' value.

#  Note that a print statement automatically prints an extra
#  space character.

def  print_uppercase_letters() :

   print( "\nUppercase English letters are: \n" )

   letter_to_print  =  0x41  #  character code of uppercase A
   
   while  letter_to_print  <=  0x5A :  #  the code of uppercase Z

      print(  " %c"  %  letter_to_print, end="" )
      letter_to_print  +=  1


def  print_lowercase_letters() :

   print( "\n\nLowercase English letters are: \n" )

   letter_to_print  =  0x61  #  character code of lowercase a
   
   while  letter_to_print  <=  0x7A :  #  the code of lowercase z

      print(  " %c"  %  letter_to_print, end="" )
      letter_to_print  +=  1


def  print_letters() :

   print_uppercase_letters()
   print_lowercase_letters()


#  The following statement is the "main" program.

print_letters()

print( "\n" )