In [1]:

    

from __future__ import print_function

print('Hello World')


    

    




Hello World

In [3]:

    

from __future__ import division
3 / 2


    

    
Out[3]:





1.5

In [5]:

    

s = "Hello World"
s


    

    
Out[5]:





'Hello World'

In [6]:

    

# Let's try to change the first letter to 'x'
s[0] = 'x' # strings are immutable, i.e. cannot be chnage programatically


    

    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-6-3a9c668aa5ab> in <module>()
      1 # Let's try to change the first letter to 'x'
----> 2 s[0] = 'x'

TypeError: 'str' object does not support item assignment

In [11]:

    

print("This is a tab \t Tab starts here") # in python 3 you need duoble quotes to have the special characters evaluated


    

    




This is a tab 	 Tab starts here

In [12]:

    

s = 'Hello World!'
s[0]


    

    
Out[12]:





'H'

In [15]:

    

s[::2]


    

    
Out[15]:





'HloWrd'

In [21]:

    

s[6:7]


    

    
Out[21]:





'W'

In [16]:

    

s[::-1]


    

    
Out[16]:





'!dlroW olleH'

In [22]:

    

s[:] # this means select everything


    

    
Out[22]:





'Hello World!'

In [25]:

    

s[1:10:3] # 1 up to 10 (not included) with incremental steps of 3


    

    
Out[25]:





'eoo'

In [ ]: