kodingwindow@kw:~$ python3
...
>>> kw="Kodingwindow"
>>> kw
'Kodingwindow'

>>> len(kw)
12

>>> kw[0]
'K'

>>> kw[11]
'w'
>>> kw[0:12:1]
'Kodingwindow'

>> kw[0:12:2]
'Kdnwno'

>>> kw[0:12:3]
'Kiwd'

>>> kw[::-1]    reverse the given string
'wodniwgnidoK'
>>> kw[::1]
'Kodingwindow'

>>> kw[::2]
'Kdnwno'

>>> kw[::3]
'Kiwd'
>>> kw[1::]
'odingwindow'

>>> kw[2::]
'dingwindow'

>>> kw[3::]
'ingwindow'