StringsDemo.py

Python 3.6.2 (v3.6.2:5fd33b5, Jul  8 2017, 04:57:36) [MSC v.1900 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> a = "hello this is python and python is used for machine learning"
>>> a[0]
'h'
>>> a[-1]
'g'
>>> a[0:5]
'hello'
>>> a[10:20]
' is python'
>>> a[0:20:2]
'hloti spto'
>>> a[0:20:1]
'hello this is python'
>>> a[0:20:2]
'hloti spto'
>>> a[-1:-10]
''
>>> a[20:10]
''
>>> a[20:10:-1]
' nohtyp si'
>>> a[10]
' '
>>> a[20]
' '
>>> a[0:10]
'hello this'
>>> a[10:0:-1]
' siht olle'
>>> a[-1:-10]
''
>>> a[-1:-10:-1]
'gninrael '
>>> a[-1]
'g'
>>> a[:]
'hello this is python and python is used for machine learning'
>>> a[::-1]
'gninrael enihcam rof desu si nohtyp dna nohtyp si siht olleh'
>>> x = 'hello'
>>> x[::-1]
'olleh'
>>> a[-1::]
'g'
>>> a[-1::-1]
'gninrael enihcam rof desu si nohtyp dna nohtyp si siht olleh'
>>> a[-1:-10]
''
>>>