180 Out[3]: True

   180 Out[3]: True

   181 

   181 

   182 In [4]: f and t

   182 In [4]: f and t

   183 Out[4]: False

   183 Out[4]: False

   184   \end{lstlisting}

   184   \end{lstlisting}

   185 \end{frame}

   186 \end{frame}

   186 

   187 

   187 \subsection{Strings}

   188 \subsection{Strings}

   188 

   189 

   189 \begin{frame}[fragile]

   190 \begin{frame}[fragile]

   250 In [1]: x, y = 1, 1.234

   251 In [1]: x, y = 1, 1.234

   251 

   252 

   252 In [2]: 'x is %s, y is %s' %(x, y)

   253 In [2]: 'x is %s, y is %s' %(x, y)

   253 Out[2]: 'x is 1, y is 1.234'

   254 Out[2]: 'x is 1, y is 1.234'

   254   \end{lstlisting}

   255   \end{lstlisting}

   259 \end{frame}

   258 \end{frame}

   260 

   259 

   261 \section{Operators}

   260 \section{Operators}

   262 \begin{frame}[fragile]

   261 \begin{frame}[fragile]

   263   \frametitle{Arithematic operators}

   262   \frametitle{Arithematic operators}

   336 Out[4]: True

   335 Out[4]: True

   337 

   336 

   338 In [5]: pos + neg != zer

   337 In [5]: pos + neg != zer

   339 Out[5]: False

   338 Out[5]: False

   340   \end{lstlisting}

   339   \end{lstlisting}

   342 \end{frame}

   340 \end{frame}

   343 

   341 

   344 \begin{frame}[fragile]

   342 \begin{frame}[fragile]

   345   \frametitle{Built-ins}

   343   \frametitle{Built-ins}

   346   \begin{lstlisting}

   344   \begin{lstlisting}

   376       \end{lstlisting}

   374       \end{lstlisting}

   377   \end{itemize}

   375   \end{itemize}

   378   \inctime{15}

   376   \inctime{15}

   379 \end{frame}

   377 \end{frame}

   380 

   378 

   394 \section{Simple IO}

   379 \section{Simple IO}

   395 \begin{frame}{Simple IO}

   380 \begin{frame}{Simple IO}

   396   \begin{block}

   381   \begin{block}

   397     {Console Input}

   382     {Console Input}

   398     \texttt{raw\_input()} waits for user input.\\Prompt string is optional.\\

   383     \texttt{raw\_input()} waits for user input.\\Prompt string is optional.\\

   417 \end{frame}

   402 \end{frame}

   418 

   403 

   419 \subsection{Basic Conditional flow}

   404 \subsection{Basic Conditional flow}

   420 \begin{frame}[fragile]

   405 \begin{frame}[fragile]

   421   \frametitle{\typ{If...elif...else} example}

   406   \frametitle{\typ{If...elif...else} example}

   423 x = int(raw_input("Enter an integer:"))

   408 x = int(raw_input("Enter an integer:"))

   424 if x < 0:

   409 if x < 0:

   425      print 'Be positive!'

   410      print 'Be positive!'

   426 elif x == 0:

   411 elif x == 0:

   427      print 'Zero'

   412      print 'Zero'

   428 elif x == 1:

   413 elif x == 1:

   429      print 'Single'

   414      print 'Single'

   430 else:

   415 else:

   431      print 'More'

   416      print 'More'

   433 \end{frame}

   419 \end{frame}

   434 

   420 

   435 \subsection{Basic Looping}

   421 \subsection{Basic Looping}

   436 \begin{frame}[fragile]

   422 \begin{frame}[fragile]

   437   \frametitle{\typ{while}}

   423   \frametitle{\typ{while}}

   468 1 1

   454 1 1

   469 2 4

   455 2 4

   470 3 9

   456 3 9

   471 4 16

   457 4 16

   472 \end{lstlisting}

   458 \end{lstlisting}

   474 \end{frame}

   460 \end{frame}

   475 

   461 

   476 \subsection{Exercises}

   462 \subsection{Exercises}

   477 \begin{frame}

   463 \begin{frame}

   478   \frametitle{Problem set 1}

   464   \frametitle{Problem set 1}

   494   \item If the number is even, divide by 2; if the number is odd, multiply by 3 and add 1.

   480   \item If the number is even, divide by 2; if the number is odd, multiply by 3 and add 1.

   495   \item Repeat the procedure with the new number.

   481   \item Repeat the procedure with the new number.

   496   \item It appears that for all starting values there is a cycle of 4, 2, 1 at which the procedure loops.

   482   \item It appears that for all starting values there is a cycle of 4, 2, 1 at which the procedure loops.

   497 \end{enumerate}

   483 \end{enumerate}

   498     Write a program that accepts the starting value and prints out the Collatz sequence.

   484     Write a program that accepts the starting value and prints out the Collatz sequence.

   503   Write a program that prints the following pyramid on the screen. 

   488   Write a program that prints the following pyramid on the screen. 

   504   \begin{lstlisting}

   489   \begin{lstlisting}

   505 1

   490 1

   506 2  2

   491 2  2

   507 3  3  3

   492 3  3  3

   508 4  4  4  4

   493 4  4  4  4

   509   \end{lstlisting}

   494   \end{lstlisting}

   510 The number of lines must be obtained from the user as input.\\

   495 The number of lines must be obtained from the user as input.\\

   511 \pause

   496 \pause

   512 \emphbar{When can your code fail?}

   497 \emphbar{When can your code fail?}

   514 \end{frame}

   509 \end{frame}

   515 

   510 

   516 \end{document}

   511 \end{document}