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     1 % Created 2010-10-10 Sun 21:15

     2 %Tutorial slides on Python.

     2 \documentclass[presentation]{beamer}

     3 %

     3 \usepackage[latin1]{inputenc}

     4 % Author: FOSSEE 

     4 \usepackage[T1]{fontenc}

     5 % Copyright (c) 2009, FOSSEE, IIT Bombay

     5 \usepackage{fixltx2e}

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     6 \usepackage{graphicx}

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    20 \usepackage{listings}

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    23 showstringspaces=false, keywordstyle=\color{blue}\bfseries}

    24 \providecommand{\alert}[1]{\textbf{#1}}

     8 \documentclass[14pt,compress]{beamer}

    26 \title{Loops}

     9 %\documentclass[draft]{beamer}

    27 \author{FOSSEE}

    10 %\documentclass[compress,handout]{beamer}

    11 %\usepackage{pgfpages} 

    12 %\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]

    13 

    14 % Modified from: generic-ornate-15min-45min.de.tex

    15 \mode<presentation>

    16 {

    17   \usetheme{Warsaw}

    18   \useoutertheme{infolines}

    19   \setbeamercovered{transparent}

    20 }

    21 

    22 \usepackage[english]{babel}

    23 \usepackage[latin1]{inputenc}

    24 %\usepackage{times}

    25 \usepackage[T1]{fontenc}

    26 

    27 \usepackage{ae,aecompl}

    28 \usepackage{mathpazo,courier,euler}

    29 \usepackage[scaled=.95]{helvet}

    30 

    31 \definecolor{darkgreen}{rgb}{0,0.5,0}

    32 

    33 \usepackage{listings}

    34 \lstset{language=Python,

    35     basicstyle=\ttfamily\bfseries,

    36     commentstyle=\color{red}\itshape,

    37   stringstyle=\color{darkgreen},

    38   showstringspaces=false,

    39   keywordstyle=\color{blue}\bfseries}

    40 

    41 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    42 % Macros

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    54 

    55 \newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }

    56 

    57 % Title page

    58 \title{Your Title Here}

    59 

    60 \author[FOSSEE] {FOSSEE}

    61 

    62 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}

    65 % DOCUMENT STARTS

    30 \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}

    68 \begin{frame}

    33 \maketitle

    69   \maketitle

    70 \end{frame}

    84 \begin{frame}[fragile]

    37 

    85   \frametitle{Summary}

    38 

    86   \begin{itemize}

    39 

    87     \item 

    40 

    88   \end{itemize}

    41 

    89 \end{frame}

    92   \frametitle{Thank you!}  

    44 \frametitle{Outline}

    45 \label{sec-1}

    46 

    47 \begin{itemize}

    48 \item Loop while a condition is true.

    49 \item Iterate over a sequence

    50 \item Breaking out of loops.

    51 \item Skipping iterations.

    52 \end{itemize}

    53 \end{frame}

    54 \begin{frame}

    55 \frametitle{Question 1}

    56 \label{sec-2}

    57 

    58   Write a \texttt{while} loop to print the squares of all the even

    59   numbers below 10. 

    60 \end{frame}

    61 \begin{frame}[fragile]

    62 \frametitle{Solution 1}

    63 \label{sec-3}

    64 

    65 \lstset{language=Python}

    66 \begin{lstlisting}

    67 In []: i = 2

    68 

    69 In []:  while i<10:

    70  ....:     print i*i

    71  ....:     i += 2

    72 \end{lstlisting}

    73 \end{frame}

    74 \begin{frame}

    75 \frametitle{Question 2}

    76 \label{sec-4}

    77 

    78   Write a \texttt{for} loop to print the squares of all the even numbers

    79   below 10.

    80 \end{frame}

    81 \begin{frame}[fragile]

    82 \frametitle{Solution 2}

    83 \label{sec-5}

    84 

    85 \lstset{language=Python}

    86 \begin{lstlisting}

    87 In []: for n in range(2, 10, 2):

    88  ....:     print n*n

    89 \end{lstlisting}

    90 \end{frame}

    91 \begin{frame}

    92 \frametitle{Question 3}

    93 \label{sec-6}

    94 

    95   Using the \texttt{continue} keyword modify the \texttt{for} loop to print the

    96   squares of even numbers below 10, to print the squares of only

    97   multiples of 4. (Do not modify the range function call.)

    98 \end{frame}

    99 \begin{frame}[fragile]

   100 \frametitle{Solution 3}

   101 \label{sec-7}

   102 

   103 \lstset{language=Python}

   104 \begin{lstlisting}

   105 for n in range(2, 10, 2):

   106     if n%4:

   107         continue      

   108     print n*n

   109 \end{lstlisting}

   110 \end{frame}

   111 \begin{frame}

   112 \frametitle{Summary}

   113 \label{sec-8}

   114 

   115   You should now be able to --

   116 \begin{itemize}

   117 \item use the \texttt{for} loop

   118 \item use the \texttt{while} loop

   119 \item Use \texttt{break}, \texttt{continue} and \texttt{pass} statements

   120 \end{itemize}

   121 \end{frame}

   122 \begin{frame}

   123 \frametitle{Thank you!}

   124 \label{sec-9}

   125