3.3 LO: getting started with strings (2) [madhu] 

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* strings 

  + single, double, triple quoted 

* accessing elements 

* show immutability 

* tell that there are methods for manipulation 

Hello friends. Welcome to this spoken tutorial on Getting started with

strings.

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In this tutorial, we will learn what do we actually mean by strings in

python, how python supports the use of strings. We will also learn

some of the operations that can be performed on strings.

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To begin with let us start ipython, by typing::

  ipython

on the terminal

So what are strings? In Python anything within either single quotes

or double quotes or triple single quotes or triple double quotes are

strings. This is true whatsoever, even if there is only one character

within the quotes

{{{ Type in ipython the following and read them as you type }}}::

  'This is a string'

  "This is a string too'

  '''This is a string as well'''

  """This is also a string"""

  'p'

We can assign this string to any variable::

  a = 'Hello, World!'

Now 'a' is a string variable. String is a collection of characters. In

addition string is an immutable collection. So all the operations that

are applicable to any other immutable collection in Python works on

string as well. So we can add two strings::

  a = 'Hello'

  b = 'World'

  c = a + ', ' + b + '!'

We can add string variables as well as the strings themselves all in

the same statement. The addition operation performs the concatenation

of two strings.

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This brings us to the end of another session. In this tutorial session

we learnt

  *

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This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India

Hope you have enjoyed and found it useful.

Thankyou

.. Author              : Madhu

   Internal Reviewer 1 :         [potential reviewer: Nishanth]

   Internal Reviewer 2 :         [potential reviewer: Amit]

   External Reviewer   :