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Diffstat (limited to 'getting_started_with_functions/slides.tex')
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diff --git a/getting_started_with_functions/slides.tex b/getting_started_with_functions/slides.tex index e9eaa81..a424b28 100644 --- a/getting_started_with_functions/slides.tex +++ b/getting_started_with_functions/slides.tex @@ -1,4 +1,4 @@ -% Created 2010-11-10 Wed 18:59 +% Created 2011-07-08 Fri 14:25 \documentclass[presentation]{beamer} \usepackage[latin1]{inputenc} \usepackage[T1]{fontenc} @@ -8,7 +8,6 @@ \usepackage{float} \usepackage{wrapfig} \usepackage{soul} -\usepackage{t1enc} \usepackage{textcomp} \usepackage{marvosym} \usepackage{wasysym} @@ -24,14 +23,13 @@ commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen}, showstringspaces=false, keywordstyle=\color{blue}\bfseries} \providecommand{\alert}[1]{\textbf{#1}} -\title{Getting started with functions} +\title{} \author{FOSSEE} \date{} \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent} \begin{document} -\maketitle @@ -41,146 +39,124 @@ showstringspaces=false, keywordstyle=\color{blue}\bfseries} + +\begin{frame} + +\begin{center} +\vspace{12pt} +\textcolor{blue}{\huge Getting started with \texttt{functions}} +\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 Define a function. +\item Define functions with arguments. +\item Learn about docstrings. +\item Learn about function return value. +\item Read and understand code. +\end{itemize} +\end{frame} \begin{frame} -\frametitle{Outline} -\label{sec-1} +\frametitle{Pre-requisite} +\label{sec-3} + +Spoken tutorial on - \begin{itemize} -\item Define functions -\item Pass arguments to functions -\item Learn about docstrings -\item Return values from functions +\item Conditionals. +\item Loops. \end{itemize} \end{frame} \begin{frame} \frametitle{Function} -\label{sec-2} +\label{sec-4} + \begin{itemize} \item Eliminate code redundancy \item Help in code reuse \item Subroutine - \begin{itemize} \item relatively independent of remaining code \end{itemize} - \end{itemize} \end{frame} \begin{frame}[fragile] -\frametitle{\texttt{f(x)} a mathematical function} -\label{sec-3} - - - $f(x) = x^{2}$ - -\begin{verbatim} - f(1) -> 1 - f(2) -> 4 -\end{verbatim} -\end{frame} -\begin{frame}[fragile] -\frametitle{Define \texttt{f(x)} in Python} -\label{sec-4} +\frametitle{Define \verb~f(x)~ in Python} +\label{sec-5} -\begin{verbatim} +\lstset{language=Python} +\begin{lstlisting} def f(x): return x*x -\end{verbatim} +\end{lstlisting} + \begin{itemize} -\item \texttt{def} - keyword -\item \texttt{f} - function name -\item \texttt{x} - parameter / argument to function \texttt{f} +\item \verb~def~ - keyword +\item \verb~f~ - function name +\item \verb~x~ - parameter / argument to function \verb~f~ \end{itemize} \end{frame} \begin{frame} \frametitle{Exercise 1} -\label{sec-5} - - - Write a python function named \texttt{cube} which computes the cube of a given - number \texttt{n}. - -\begin{itemize} -\item Pause here and try to solve the problem yourself. -\end{itemize} -\end{frame} -\begin{frame}[fragile] -\frametitle{Solution} \label{sec-6} -\begin{verbatim} -def cube(n): - return n**3 -\end{verbatim} -\end{frame} -\begin{frame}[fragile] -\frametitle{\texttt{greet} function} -\label{sec-7} - Function \texttt{greet} which will print \texttt{Hello World!}. -\begin{verbatim} -def greet(): - print "Hello World!" -\end{verbatim} \begin{itemize} -\item Call the function \texttt{greet} -\begin{verbatim} - In []: greet() - Hello World! -\end{verbatim} - +\item Write a python function named \verb~cube~ which computes the cube of a given + number \verb~n~. \end{itemize} \end{frame} \begin{frame} \frametitle{Exercise 2} -\label{sec-8} - +\label{sec-7} - Write a python function named \texttt{avg} which computes the average of - \texttt{a} and \texttt{b}. -\begin{itemize} -\item Pause here and try to solve the problem yourself. -\end{itemize} -\end{frame} -\begin{frame}[fragile] -\frametitle{Solution 2} -\label{sec-9} - -\begin{verbatim} -def avg(a,b): - return (a + b)/2 -\end{verbatim} \begin{itemize} -\item \texttt{a} and \texttt{b} are parameters -\item \texttt{def f(p1, p2, p3, ... , pn)} +\item Write a python function named \verb~avg~ which computes the average of + \verb~a~ and \verb~b~. \end{itemize} \end{frame} \begin{frame}[fragile] \frametitle{Docstring} -\label{sec-10} +\label{sec-8} + \begin{itemize} \item Documenting/commenting code is a good practice -\begin{verbatim} +\lstset{language=Python} +\begin{lstlisting} def avg(a,b): """ avg takes two numbers as input (a & b), and returns the average of a and b""" return (a+b)/2 -\end{verbatim} +\end{lstlisting} \item Docstring - \begin{itemize} -\item written in the line after the \texttt{def} line. +\item written in the line after the \verb~def~ line. \item Inside triple quote. \end{itemize} - \item Documentation \begin{verbatim} avg? @@ -190,48 +166,41 @@ def avg(a,b): \end{frame} \begin{frame} \frametitle{Exercise 3} -\label{sec-11} +\label{sec-9} + - Add docstring to the function f. +\begin{itemize} +\item Add docstring to the function f. +\end{itemize} \end{frame} \begin{frame}[fragile] \frametitle{Solution 3} -\label{sec-12} - +\label{sec-10} -\begin{verbatim} +\lstset{language=Python} +\begin{lstlisting} def f(x): """Accepts a number x as argument and, returns the square of the number x.""" return x*x -\end{verbatim} +\end{lstlisting} \end{frame} \begin{frame} \frametitle{Exercise 4} -\label{sec-13} +\label{sec-11} - Write a python function named \texttt{circle} which returns the area and - perimeter of a circle given radius \texttt{r}. -\end{frame} -\begin{frame}[fragile] -\frametitle{Solution 4} -\label{sec-14} -\begin{verbatim} -def circle(r): - """returns area and perimeter of a circle given - radius r""" - pi = 3.14 - area = pi * r * r - perimeter = 2 * pi * r - return area, perimeter -\end{verbatim} +\begin{itemize} +\item Write a python function named \verb~circle~ which returns the area and + perimeter of a circle given radius \verb~r~. +\end{itemize} \end{frame} \begin{frame}[fragile] -\frametitle{\texttt{what}} -\label{sec-15} +\frametitle{\verb~what~} +\label{sec-12} -\begin{verbatim} +\lstset{language=Python} +\begin{lstlisting} def what( n ): if n < 0: n = -n @@ -240,13 +209,14 @@ def what( n ): return False n /= 10 return True -\end{verbatim} +\end{lstlisting} \end{frame} \begin{frame}[fragile] -\frametitle{\texttt{even\_digits}} -\label{sec-16} +\frametitle{\verb~even\_digits~} +\label{sec-13} -\begin{verbatim} +\lstset{language=Python} +\begin{lstlisting} def even_digits( n ): """returns True if all the digits of number n is even returns False if all the digits @@ -257,25 +227,27 @@ def even_digits( n ): return False n /= 10 return True -\end{verbatim} +\end{lstlisting} \end{frame} \begin{frame}[fragile] -\frametitle{\texttt{what}} -\label{sec-17} +\frametitle{\verb~what~} +\label{sec-14} -\begin{verbatim} +\lstset{language=Python} +\begin{lstlisting} def what( n ): i = 1 while i * i < n: i += 1 return i * i == n, i -\end{verbatim} +\end{lstlisting} \end{frame} \begin{frame}[fragile] -\frametitle{\texttt{is\_perfect\_square}} -\label{sec-18} +\frametitle{\verb~is\_perfect\_square~} +\label{sec-15} -\begin{verbatim} +\lstset{language=Python} +\begin{lstlisting} def is_perfect_square( n ): """returns True and square root of n, if n is a perfect square, otherwise @@ -285,34 +257,83 @@ def is_perfect_square( n ): while i * i < n: i += 1 return i * i == n, i -\end{verbatim} +\end{lstlisting} \end{frame} \begin{frame} \frametitle{Summary} -\label{sec-19} +\label{sec-16} + + In this tutorial, we have learnt to, + + +\begin{itemize} +\item Define functions in Python by using the keyword ``def''. +\item Call the function by specifying the function name. +\item Assign a docstring to a function by putting it as a triple quoted string. +\item Pass parameters to a function. +\item Return values from a function. +\end{itemize} +\end{frame} +\begin{frame}[fragile] +\frametitle{Evaluation} +\label{sec-17} + +\begin{enumerate} +\item What will the function do? +\lstset{language=Python} +\begin{lstlisting} +def what(x) + return x*x +\end{lstlisting} \begin{itemize} -\item Functions in Python -\item Passing parameters to a function -\item Returning values from a function -\item We also did few code reading exercises. +\item Returns the square of x +\item Returns x +\item Function doesn't have docstring +\item Error \end{itemize} +\vspace{3pt} +\item How many arguments can be passed to a python function? +\begin{itemize} +\item None +\item One +\item Two +\item Any +\end{itemize} +\vspace{3pt} +\item Write a function which calculates the area of a rectangle. +\end{enumerate} +\end{frame} +\begin{frame}[fragile] +\frametitle{Solutions} +\label{sec-18} + + +\begin{enumerate} +\item Error +\vspace{16pt} +\item Any +\vspace{12pt} +\item \lstset{language=Python} +\begin{lstlisting} +def area(l,b): + return l * b +\end{lstlisting} +\end{enumerate} \end{frame} \begin{frame} -\frametitle{Thank you!} -\label{sec-20} \begin{block}{} \begin{center} - This spoken tutorial has been produced by the - \textcolor{blue}{FOSSEE} team, which is funded by the + \textcolor{blue}{\Large THANK YOU!} \end{center} + \end{block} +\begin{block}{} \begin{center} - \textcolor{blue}{National Mission on Education through \\ - Information \& Communication Technology \\ - MHRD, Govt. of India}. + For more Information, visit our website\\ + \url{http://fossee.in/} \end{center} \end{block} \end{frame} -\end{document} +\end{document}
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