% Created 2010-10-10 Sun 21:15

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\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{Loops}

\author{FOSSEE}

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

\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}

\begin{frame}

\frametitle{Question 1}

\label{sec-2}

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

  numbers below 10. 

\end{frame}

\frametitle{Solution 1}

\label{sec-3}

\lstset{language=Python}

\begin{lstlisting}

In []: i = 2

In []:  while i<10:

 ....:     print i*i

 ....:     i += 2

\end{lstlisting}

\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{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}

\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}

\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}