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% Created 2011-05-13 Fri 12:39
\documentclass[presentation]{beamer}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\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}
\providecommand{\alert}[1]{\textbf{#1}}
\title{}
\author{FOSSEE}
\date{}
\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
\begin{document}
\begin{frame}
\begin{center}
\textcolor{blue}{Getting started -- \texttt{for}}
\end{center}
\begin{center}
\includegraphics[scale=0.25]{../images/iitb-logo.png}\\
Developed by FOSSEE Team, IIT-Bombay. \\
Funded by National Mission on Education through ICT
MHRD, Govt. of India
\end{center}
\end{frame}
\begin{frame}
\frametitle{Objectives}
\label{sec-2}
At the end of this tutorial, you will be able to,
\begin{itemize}
\item Write blocks of code in python.
\item Use the ``for`` loop.
\item Use ``range()`` function.
\item Write blocks in python interpreter
\item Write blocks in ipython interpreter.
\end{itemize}
\end{frame}
\begin{frame}[fragile]
\frametitle{Whitespace in Python}
\label{sec-3}
\begin{itemize}
\item Whitespace is significant
\begin{itemize}
\item blocks are visually separated
\end{itemize}
\item Blocks are indented using 4 spaces
\begin{verbatim}
Block A
Block A
Block B
Block B
Block A
\end{verbatim}
\verb~Block B~ is an inner block and is indented using 4 spaces
\end{itemize}
\end{frame}
\begin{frame}[fragile]
\frametitle{Question 1}
\label{sec-4}
Write a \verb~for~ loop which iterates through a list of numbers and find
the square root of each number.
\begin{verbatim}
\end{verbatim}
The numbers are,
\begin{verbatim}
1369, 7225, 3364, 7056, 5625, 729, 7056,
576, 2916
\end{verbatim}
\end{frame}
\begin{frame}[fragile]
\frametitle{Solution 1}
\label{sec-5}
\begin{itemize}
\item Open text editor and type the following code
\lstset{language=Python}
\begin{lstlisting}
numbers = [1369, 7225, 3364, 7056, 5625, 729, 7056,
576, 2916]
for each in numbers:
print "Square root of", each, "is", sqrt(each)
print "This is not in for loop!"
\end{lstlisting}
\end{itemize}
\end{frame}
\begin{frame}[fragile]
\frametitle{Save \& run script}
\label{sec-6}
\begin{itemize}
\item Save the script as \verb~list_roots.py~
\item Run in \verb~ipython~ interpreter as,
\begin{verbatim}
In []: %run -i list_roots.py
\end{verbatim}
\end{itemize}
\end{frame}
\begin{frame}[fragile]
\frametitle{Question 2}
\label{sec-7}
Print the square root of numbers in the list.
\begin{verbatim}
\end{verbatim}
Numbers are,
\begin{verbatim}
7225, 3268, 3364, 2966, 7056, 5625, 729, 5547,
7056, 576, 2916
\end{verbatim}
\end{frame}
\begin{frame}[fragile]
\frametitle{Question 3}
\label{sec-8}
Find out the cube of all the numbers from 1 to 10.
\begin{verbatim}
\end{verbatim}
\emph{do it in the python interpreter}
\end{frame}
\begin{frame}
\frametitle{\verb~range()~ function}
\label{sec-9}
\begin{itemize}
\item in built function in Python
\item generates a list of integers
\begin{itemize}
\item \emph{syntax:} range([start,] stop[, step])
\item \emph{example:}
\begin{itemize}
\item range(1, 20) - \emph{generates integers from 1 to 20}
\item range(20) - \emph{generates integers from 0 to 20}
\end{itemize}
\end{itemize}
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Question 4}
\label{sec-10}
Print all the odd numbers from 1 to 50.
\end{frame}
\begin{frame}
\frametitle{Summary}
\label{sec-11}
In this tutorial,we learnt to,
\begin{itemize}
\item Create blocks in python using ``for
\item Indent the blocks of code
\item Iterate over a list using ``for`` loop
\item Use the ``range()`` function
\end{itemize}
\end{frame}
\begin{frame}
\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{frame}
\end{document}
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