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#+TITLE:    
#+AUTHOR:    FOSSEE
#+EMAIL:     
#+DATE:    

#+DESCRIPTION: 
#+KEYWORDS: 
#+LANGUAGE:  en
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* 
  #+begin_latex
\begin{center}
\vspace{12pt}
\textcolor{blue}{\huge Getting started with Strings}
\end{center}
\vspace{18pt}
\begin{center}
\vspace{10pt}
\includegraphics[scale=0.95]{../images/fossee-logo.png}\\
\vspace{5pt}
\scriptsize Developed by FOSSEE Team, IIT-Bombay. \\ 
\scriptsize Funded by National Mission on Education through ICT\\
\scriptsize  MHRD,Govt. of India\\
\includegraphics[scale=0.30]{../images/iitb-logo.png}\\
\end{center}
#+end_latex
* Objectives
  At the end of this tutorial, you will be able to, 
  - Define strings in differnt ways.
  - Concatenate strings. 
  - Print a string repeatedly. 
  - Access individual elements of the string.
  - Learn immutability of strings.
* Exercise 1
  Obtain the string ~%% -------------------- %%~ (20 hyphens) without
  typing out all the twenty hyphens.
* Exercise 2
  Given a string, ~s~ which is ~Hello World~ , what is the output of::
  #+begin_src python
    s[-5] 
    s[-10]
    s[-15]
  #+end_src
* Summary
  In this tutorial, we have learnt,
  - To define strings in differnt ways.
  - To concatenate strings by performing addition.
  - To repeat a string 'n' number of times by doing multiplication.
  - To access individual elements of the string by using their subscripts.
  - Use the concept of immutability of strings.

* Evaluation
  1. Write code to assign s, the string ``' is called the apostrophe``


  2. Given strings s and t, ``s = "Hello"`` and ``t = "World"`` and an
   integer r, ``r = 2``. What is the output of s * r + s * t?


  3. How will you change s='hello' to s='Hello'.

    - s[ 0 ]= H
    - s[ 0 ]='H'
    - strings are immutable,hence cannot be manipulated.
* Solutions
  1. s = "` is called the apostrophe" 


  2. HelloHelloWorldWorld
     

  3. Strings are immutable,hence cannot be manipulated.  

* 
  #+begin_latex
  \begin{block}{}
  \begin{center}
  \textcolor{blue}{\Large THANK YOU!} 
  \end{center}
  \end{block}
\begin{block}{}
  \begin{center}
    For more Information, visit our website\\
    \url{http://fossee.in/}
  \end{center}  
  \end{block}
#+end_latex