#  Slicings.py (c) Kari Laitinen

#  http://www.naturalprogramming.com

#  2006-05-24  File created.
#  2022-12-27  Converted to Python 3.

#  This progrm demonstrates how to take "slices" of a string. Slices are
#  mostly substrings. Slices can be taken in the same way from lists and
#  tuples.

#  Slicing means using several indexes in brackets.

#  Indexing is 0-based.
#  Negative indexes (usually) mean counting backwards from end of a string.
#  Indexes are written inside brackets in the following way
#      [ starting_at_index : less_than_index  : step ]
#  where
#      starting_at_index defaults to 0,
#      less_tan_index defaults to the length of the string,
#      and step defaults to 1.


test_string  =  "ABCDEFGHIJKLMN"

print( "                                         "  + "012345678901234567890" )
print( "test_string                              "  +  test_string )
print( "test_string[ 3 ]                         "  +  test_string[ 3 ] )
print( "test_string[ - 1 ]                       "  +  test_string[ - 1 ]  )
print( "test_string[ 2 : 6 ]                     "  +  test_string[ 2 : 6 ] )
print( "test_string[ 3 : len( test_string ) ]    "  +  test_string[ 3 : len( test_string ) ] )
print( "test_string[ 3 :   ]                     "  +  test_string[ 3 :   ] )
print( "test_string[ 0 : 6 ]                     "  +  test_string[ 0 : 6 ]  )
print( "test_string[   : 6 ]                     "  +  test_string[   : 6 ] )
print( "test_string[   :   ]                     "  +  test_string[   :   ] )
print( "test_string[   :   : 2 ]                 "  +  test_string[   :   : 2 ] )
print( "test_string[ 1 : -1 ]                    "  +  test_string[ 1 : -1 ] )
print( "test_string[   :   : -1 ]                "  +  test_string[   :   : -1 ] )