--- a/getting-started-with-functions/slides.tex Wed Nov 17 23:24:57 2010 +0530
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,318 +0,0 @@
-% Created 2010-11-10 Wed 18:59
-\documentclass[presentation]{beamer}
-\usepackage[latin1]{inputenc}
-\usepackage[T1]{fontenc}
-\usepackage{fixltx2e}
-\usepackage{graphicx}
-\usepackage{longtable}
-\usepackage{float}
-\usepackage{wrapfig}
-\usepackage{soul}
-\usepackage{t1enc}
-\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{Getting started with functions}
-\author{FOSSEE}
-\date{}
-
-\usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
-\begin{document}
-
-\maketitle
-
-
-
-
-
-
-
-
-
-\begin{frame}
-\frametitle{Outline}
-\label{sec-1}
-
-\begin{itemize}
-\item Define functions
-\item Pass arguments to functions
-\item Learn about docstrings
-\item Return values from functions
-\end{itemize}
-\end{frame}
-\begin{frame}
-\frametitle{Function}
-\label{sec-2}
-
-\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}
-
-\begin{verbatim}
-def f(x):
- return x*x
-\end{verbatim}
-
-\begin{itemize}
-\item \texttt{def} - keyword
-\item \texttt{f} - function name
-\item \texttt{x} - parameter / argument to function \texttt{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}
-
-\end{itemize}
-\end{frame}
-\begin{frame}
-\frametitle{Exercise 2}
-\label{sec-8}
-
-
- 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)}
-\end{itemize}
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{Docstring}
-\label{sec-10}
-
-
-\begin{itemize}
-\item Documenting/commenting code is a good practice
-\begin{verbatim}
-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}
-\item Docstring
-
-\begin{itemize}
-\item written in the line after the \texttt{def} line.
-\item Inside triple quote.
-\end{itemize}
-
-\item Documentation
-\begin{verbatim}
- avg?
-\end{verbatim}
-
-\end{itemize}
-\end{frame}
-\begin{frame}
-\frametitle{Exercise 3}
-\label{sec-11}
-
- Add docstring to the function f.
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{Solution 3}
-\label{sec-12}
-
-
-\begin{verbatim}
-def f(x):
- """Accepts a number x as argument and,
- returns the square of the number x."""
- return x*x
-\end{verbatim}
-\end{frame}
-\begin{frame}
-\frametitle{Exercise 4}
-\label{sec-13}
-
- 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}
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{\texttt{what}}
-\label{sec-15}
-
-\begin{verbatim}
-
-def what( n ):
- if n < 0: n = -n
- while n > 0:
- if n % 2 == 1:
- return False
- n /= 10
- return True
-\end{verbatim}
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{\texttt{even\_digits}}
-\label{sec-16}
-
-\begin{verbatim}
-def even_digits( n ):
- """returns True if all the digits of number
- n is even returns False if all the digits
- of number n is not even"""
- if n < 0: n = -n
- while n > 0:
- if n % 2 == 1:
- return False
- n /= 10
- return True
-\end{verbatim}
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{\texttt{what}}
-\label{sec-17}
-
-\begin{verbatim}
-def what( n ):
- i = 1
- while i * i < n:
- i += 1
- return i * i == n, i
-\end{verbatim}
-\end{frame}
-\begin{frame}[fragile]
-\frametitle{\texttt{is\_perfect\_square}}
-\label{sec-18}
-
-\begin{verbatim}
-def is_perfect_square( n ):
- """returns True and square root of n,
- if n is a perfect square, otherwise
- returns False and the square root
- of the next perfect square"""
- i = 1
- while i * i < n:
- i += 1
- return i * i == n, i
-\end{verbatim}
-\end{frame}
-\begin{frame}
-\frametitle{Summary}
-\label{sec-19}
-
-\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.
-\end{itemize}
-\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
- \end{center}
- \begin{center}
- \textcolor{blue}{National Mission on Education through \\
- Information \& Communication Technology \\
- MHRD, Govt. of India}.
- \end{center}
- \end{block}
-\end{frame}
-
-\end{document}