Slides for loops LO.

3 files changed, 198 insertions, 78 deletions

diff --git a/loops/script.rst b/loops/script.rst
index 0c1c886..ead076d 100644
--- a/loops/script.rst
+++ b/loops/script.rst
@@ -63,7 +63,7 @@ to the right by 4 spaces.
 Following is an exercise that you must do. 
 
 %%1%% Write a ``while`` loop to print the squares of all the even
-numbers below 10. Then, return to the video.
+numbers below 10. 
 
 Please, pause the video here. Do the exercise and then continue. 
 
@@ -88,8 +88,8 @@ then iterate over it and print the required stuff.
 
 Following is an exercise that you must do. 
 
-%%2%% Pause the video here and write a ``for`` loop to print the
-squares of all the even numbers below 10. Then, return to the video. 
+%%2%% Write a ``for`` loop to print the squares of all the even
+numbers below 10. 
 
 Please, pause the video here. Do the exercise and then continue. 
 
diff --git a/loops/slides.org b/loops/slides.org
new file mode 100644
index 0000000..2003620
--- /dev/null
+++ b/loops/slides.org
@@ -0,0 +1,87 @@
+#+LaTeX_CLASS: beamer
+#+LaTeX_CLASS_OPTIONS: [presentation]
+#+BEAMER_FRAME_LEVEL: 1
+
+#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
+#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra)
+#+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC
+
+#+LaTeX_CLASS: beamer
+#+LaTeX_CLASS_OPTIONS: [presentation]
+
+#+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}
+#+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
+
+#+LaTeX_HEADER: \usepackage{listings}
+
+#+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,
+#+LaTeX_HEADER:  commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
+#+LaTeX_HEADER:  showstringspaces=false, keywordstyle=\color{blue}\bfseries}
+
+#+TITLE:    Loops
+#+AUTHOR:    FOSSEE
+#+EMAIL:     
+#+DATE:    
+
+#+DESCRIPTION: 
+#+KEYWORDS: 
+#+LANGUAGE:  en
+#+OPTIONS:   H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
+#+OPTIONS:   TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc
+
+* Outline
+  - Loop while a condition is true. 
+  - Iterate over a sequence
+  - Breaking out of loops.
+  - Skipping iterations.
+* Question 1
+  Write a ~while~ loop to print the squares of all the even
+  numbers below 10. 
+* Solution 1
+  #+begin_src python
+    In []: i = 2
+    
+    In []:  while i<10:
+     ....:     print i*i
+     ....:     i += 2
+  #+end_src
+* Question 2
+  Write a ~for~ loop to print the squares of all the even numbers
+  below 10.
+* Solution 2
+  #+begin_src python    
+    In []: for n in range(2, 10, 2):
+     ....:     print n*n
+  #+end_src
+* Question 3
+  Using the ~continue~ keyword modify the ~for~ loop to print the
+  squares of even numbers below 10, to print the squares of only
+  multiples of 4. (Do not modify the range function call.)
+* Solution 3
+  #+begin_src python    
+    for n in range(2, 10, 2):
+        if n%4:
+            continue      
+        print n*n
+  #+end_src
+* Summary
+  You should now be able to --
+  - use the ~for~ loop 
+  - use the ~while~ loop
+  - Use ~break~, ~continue~ and ~pass~ statements 
+* Thank you!
+#+begin_latex
+  \begin{block}{}
+  \begin{center}
+  This spoken tutorial has been produced by the
+  \textcolor{blue}{FOSSEE} team, which is funded by the 
+  \end{center}
+  \begin{center}
+    \textcolor{blue}{National Mission on Education through \\
+      Information \& Communication Technology \\ 
+      MHRD, Govt. of India}.
+  \end{center}  
+  \end{block}
+#+end_latex
+
+
diff --git a/loops/slides.tex b/loops/slides.tex
index df1462c..245bb7e 100644
--- a/loops/slides.tex
+++ b/loops/slides.tex
@@ -1,95 +1,128 @@
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%Tutorial slides on Python.
-%
-% Author: FOSSEE 
-% Copyright (c) 2009, FOSSEE, IIT Bombay
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-\documentclass[14pt,compress]{beamer}
-%\documentclass[draft]{beamer}
-%\documentclass[compress,handout]{beamer}
-%\usepackage{pgfpages} 
-%\pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm]
-
-% Modified from: generic-ornate-15min-45min.de.tex
-\mode<presentation>
-{
-  \usetheme{Warsaw}
-  \useoutertheme{infolines}
-  \setbeamercovered{transparent}
-}
-
-\usepackage[english]{babel}
+% Created 2010-10-10 Sun 21:15
+\documentclass[presentation]{beamer}
 \usepackage[latin1]{inputenc}
-%\usepackage{times}
 \usepackage[T1]{fontenc}
-
-\usepackage{ae,aecompl}
-\usepackage{mathpazo,courier,euler}
-\usepackage[scaled=.95]{helvet}
-
-\definecolor{darkgreen}{rgb}{0,0.5,0}
-
+\usepackage{fixltx2e}
+\usepackage{graphicx}
+\usepackage{longtable}
+\usepackage{float}
+\usepackage{wrapfig}
+\usepackage{soul}
+\usepackage{textcomp}
+\usepackage{marvosym}
+\usepackage{wasysym}
+\usepackage{latexsym}
+\usepackage{amssymb}
+\usepackage{hyperref}
+\tolerance=1000
+\usepackage[english]{babel} \usepackage{ae,aecompl}
+\usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
 \usepackage{listings}
-\lstset{language=Python,
-    basicstyle=\ttfamily\bfseries,
-    commentstyle=\color{red}\itshape,
-  stringstyle=\color{darkgreen},
-  showstringspaces=false,
-  keywordstyle=\color{blue}\bfseries}
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% Macros
-\setbeamercolor{emphbar}{bg=blue!20, fg=black}
-\newcommand{\emphbar}[1]
-{\begin{beamercolorbox}[rounded=true]{emphbar} 
-      {#1}
- \end{beamercolorbox}
-}
-\newcounter{time}
-\setcounter{time}{0}
-\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
-
-\newcommand{\typ}[1]{\lstinline{#1}}
-
-\newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
-
-% Title page
-\title{Your Title Here}
-
-\author[FOSSEE] {FOSSEE}
-
-\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
+\lstset{language=Python, basicstyle=\ttfamily\bfseries,
+commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
+showstringspaces=false, keywordstyle=\color{blue}\bfseries}
+\providecommand{\alert}[1]{\textbf{#1}}
+
+\title{Loops}
+\author{FOSSEE}
 \date{}
 
-% DOCUMENT STARTS
+\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
 \begin{document}
 
+\maketitle
+
+
+
+
+
+
+
+
+
 \begin{frame}
-  \maketitle
+\frametitle{Outline}
+\label{sec-1}
+
+\begin{itemize}
+\item Loop while a condition is true.
+\item Iterate over a sequence
+\item Breaking out of loops.
+\item Skipping iterations.
+\end{itemize}
 \end{frame}
+\begin{frame}
+\frametitle{Question 1}
+\label{sec-2}
 
-\begin{frame}[fragile]
-  \frametitle{Outline}
-  \begin{itemize}
-    \item 
-  \end{itemize}
+  Write a \texttt{while} loop to print the squares of all the even
+  numbers below 10. 
 \end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 1}
+\label{sec-3}
 
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%              All other slides here.                  %%
-%% The same slides will be used in a classroom setting. %% 
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\lstset{language=Python}
+\begin{lstlisting}
+In []: i = 2
 
+In []:  while i<10:
+ ....:     print i*i
+ ....:     i += 2
+\end{lstlisting}
+\end{frame}
+\begin{frame}
+\frametitle{Question 2}
+\label{sec-4}
+
+  Write a \texttt{for} loop to print the squares of all the even numbers
+  below 10.
+\end{frame}
 \begin{frame}[fragile]
-  \frametitle{Summary}
-  \begin{itemize}
-    \item 
-  \end{itemize}
+\frametitle{Solution 2}
+\label{sec-5}
+
+\lstset{language=Python}
+\begin{lstlisting}
+In []: for n in range(2, 10, 2):
+ ....:     print n*n
+\end{lstlisting}
 \end{frame}
+\begin{frame}
+\frametitle{Question 3}
+\label{sec-6}
 
+  Using the \texttt{continue} keyword modify the \texttt{for} loop to print the
+  squares of even numbers below 10, to print the squares of only
+  multiples of 4. (Do not modify the range function call.)
+\end{frame}
+\begin{frame}[fragile]
+\frametitle{Solution 3}
+\label{sec-7}
+
+\lstset{language=Python}
+\begin{lstlisting}
+for n in range(2, 10, 2):
+    if n%4:
+        continue      
+    print n*n
+\end{lstlisting}
+\end{frame}
 \begin{frame}
-  \frametitle{Thank you!}  
+\frametitle{Summary}
+\label{sec-8}
+
+  You should now be able to --
+\begin{itemize}
+\item use the \texttt{for} loop
+\item use the \texttt{while} loop
+\item Use \texttt{break}, \texttt{continue} and \texttt{pass} statements
+\end{itemize}
+\end{frame}
+\begin{frame}
+\frametitle{Thank you!}
+\label{sec-9}
+
   \begin{block}{}
   \begin{center}
   This spoken tutorial has been produced by the