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% Created 2011-06-24 Fri 10:08
\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}
\vspace{12pt}
\textcolor{blue}{\huge Conditionals}
\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{frame}
\begin{frame}
\frametitle{Objectives}
\label{sec-2}
At the end of this tutorial, you will be able to,
\begin{itemize}
\item Use if/else blocks.
\item Use if/elif/else blocks.
\item Use the Ternary conditional statement - C if X else Y.
\end{itemize}
\end{frame}
\begin{frame}
\frametitle{Pre-requisite}
\label{sec-3}
Spoken tutorial on -
\begin{itemize}
\item Basic Datatypes and Operators
\end{itemize}
\end{frame}
\begin{frame}[fragile]
\frametitle{\verb~if/elif~ ladder}
\label{sec-4}
\lstset{language=Python}
\begin{lstlisting}
if user == 'admin':
# Do admin operations
elif user == 'moderator':
# Do moderator operations
elif user == 'client':
# Do customer operations
\end{lstlisting}
\end{frame}
\begin{frame}
\frametitle{Exercise 1}
\label{sec-5}
Given a number, num. Write an if else block to print num, as is, if
it is divisible by 10, else print 10 * num.
\end{frame}
\begin{frame}[fragile]
\frametitle{Solution 1}
\label{sec-6}
\lstset{language=Python}
\begin{lstlisting}
if num%10 == 0:
print num
else:
print 10*num
\end{lstlisting}
\end{frame}
\begin{frame}
\frametitle{Exercise 2}
\label{sec-7}
Given a number, num. Write a ternary operator to print num, as is,
if it is divisible by 10, else print 10 * num.
\end{frame}
\begin{frame}[fragile]
\frametitle{Solution 2}
\label{sec-8}
\lstset{language=Python}
\begin{lstlisting}
print num if num%10 == 0 else 10*num
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{Pass statement}
\label{sec-9}
a = raw\_input("Enter `c' to calculate and exit, `d' to display the existing results exit and `x' to exit and any other key to continue: ")
\lstset{language=Python}
\begin{lstlisting}
if a == 'c':
# Calculate the marks and exit
elif a == 'd':
# Display the results and exit
elif a == 'x':
# Exit the program
else:
pass
\end{lstlisting}
\end{frame}
\begin{frame}
\frametitle{Summary}
\label{sec-10}
In this tutorial, we have learnt to,
\begin{itemize}
\item Understand the conditional statements in Python.
\item Use if/else statement.
\item Use if/elif/else statement.
\item Apply the ternary conditional statement - C if X else Y.
\item Use ``pass'' statement.
\end{itemize}
\end{frame}
\begin{frame}[fragile]
\frametitle{Evaluation}
\label{sec-11}
\begin{enumerate}
\item Use conditional statements for the following.
Given a variable ``time'', print ``Good Morning'' if it is less
than 12, otherwise print ``Hello''.
\vspace{10pt}
\item Convert the if else ladder below into a ternary conditional
statement.
\lstset{language=Python}
\begin{lstlisting}
x = 20
if x > 10:
print x * 100
else:
print x
\end{lstlisting}
\end{enumerate}
\end{frame}
\begin{frame}[fragile]
\frametitle{Solutions}
\label{sec-12}
\begin{enumerate}
\item \lstset{language=Python}
\begin{lstlisting}
if time < 12:
print "Good Morning"
else:
print "Hello"
\end{lstlisting}
\vspace{9pt}
\item \lstset{language=Python}
\begin{lstlisting}
print x * 100 if x > 10 else x
\end{lstlisting}
\end{enumerate}
\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{frame}
\end{document}
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