In [1]:

    

string = 'Strings are defined as ordered collections of characters.'


    

In [2]:

    

string[:]


    

    
Out[2]:





'Strings are defined as ordered collections of characters.'

In [3]:

    

string[0:3]


    

    
Out[3]:





'Str'

In [4]:

    

string[:3]


    

    
Out[4]:





'Str'

In [5]:

    

string[-3:]


    

    
Out[5]:





'rs.'

In [6]:

    

string[2:5]


    

    
Out[6]:





'rin'

In [7]:

    

string[0:10:2]


    

    
Out[7]:





'Srnsa'

In [8]:

    

string[::-1]


    

    
Out[8]:





'.sretcarahc fo snoitcelloc deredro sa denifed era sgnirtS'