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    10 #+LaTeX_CLASS_OPTIONS: [presentation]

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    12 #+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}

    13 #+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}

    14 

    15 #+LaTeX_HEADER: \usepackage{listings}

    16 

    17 #+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,

    18 #+LaTeX_HEADER:  commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},

    19 #+LaTeX_HEADER:  showstringspaces=false, keywordstyle=\color{blue}\bfseries}

    20 

    21 #+TITLE:    

    22 #+AUTHOR:    FOSSEE

    23 #+EMAIL:     

    24 #+DATE:    

    25 

    26 #+DESCRIPTION: 

    27 #+KEYWORDS: 

    28 #+LANGUAGE:  en

    29 #+OPTIONS:   H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t

    30 #+OPTIONS:   TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc

    31 

    32 * Outline

    33 *** Defining strings

    34 *** Concatenation

    35 *** Accessing individual elements

    36 *** Immutability of strings

    37 * Question 1

    38   Obtain the string ~%% -------------------- %%~ (20 hyphens) without

    39   typing out all the twenty hyphens.

    40 * Solution 1

    41   #+begin_src python

    42     s = "%% " + "-"*20 + " %%"

    43   #+end_src

    44 * Question 2

    45   Given a string, ~s~ which is ~Hello World~ , what is the output of::

    46   #+begin_src python

    47     s[-5] 

    48     s[-10]

    49     s[-15]

    50   #+end_src

    51 * Solution 2

    52   #+begin_src python

    53     'W'

    54     'e'

    55     IndexError

    56   #+end_src

    57 * Summary

    58   In this tutorial we have learnt

    59     + How to define strings

    60     + Different ways of defining a string

    61     + String concatenation and repetition

    62     + Accessing individual elements of the string

    63     + Immutability of strings

    64   

    65 * Thank you!

    66 #+begin_latex

    67   \begin{block}{}

    68   \begin{center}

    69   This spoken tutorial has been produced by the

    70   \textcolor{blue}{FOSSEE} team, which is funded by the 

    71   \end{center}

    72   \begin{center}

    73     \textcolor{blue}{National Mission on Education through \\

    74       Information \& Communication Technology \\ 

    75       MHRD, Govt. of India}.

    76   \end{center}  

    77   \end{block}

    78 #+end_latex

    79 

    80