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#+LaTeX_CLASS: beamer
#+LaTeX_CLASS_OPTIONS: [presentation]
#+BEAMER_FRAME_LEVEL: 1
#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra)
#+PROPERTY: BEAMER_col_ALL 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 :ETC
#+LaTeX_CLASS: beamer
#+LaTeX_CLASS_OPTIONS: [presentation]
#+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}
#+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}
#+LaTeX_HEADER: \usepackage{listings}
#+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,
#+LaTeX_HEADER: commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen},
#+LaTeX_HEADER: showstringspaces=false, keywordstyle=\color{blue}\bfseries}
#+TITLE:
#+AUTHOR: FOSSEE
#+EMAIL:
#+DATE:
#+DESCRIPTION:
#+KEYWORDS:
#+LANGUAGE: en
#+OPTIONS: H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
#+OPTIONS: TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc
*
#+begin_latex
\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_latex
* Objectives
At the end of this tutorial, you will be able to,
- Use if/else blocks.
- Use if/elif/else blocks.
- Use the Ternary conditional statement - C if X else Y.
* Pre-requisite
Spoken tutorial on -
- Basic Datatypes and Operators
* ~if/elif~ ladder
#+begin_src python
if user == 'admin':
# Do admin operations
elif user == 'moderator':
# Do moderator operations
elif user == 'client':
# Do customer operations
#+end_src
* Exercise 1
Given a number, num. Write an if else block to print num, as is, if
it is divisible by 10, else print 10 * num.
* Solution 1
#+begin_src python
if num%10 == 0:
print num
else:
print 10*num
#+end_src
* Exercise 2
Given a number, num. Write a ternary operator to print num, as is,
if it is divisible by 10, else print 10 * num.
* Solution 2
#+begin_src python
print num if num%10 == 0 else 10*num
#+end_src
* Pass statement
#+begin_src python
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: ")
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_src
* Summary
In this tutorial, we have learnt to,
- Understand the conditional statements in Python.
- Use if/else statement.
- Use if/elif/else statement.
- Apply the ternary conditional statement - C if X else Y.
- Use "pass" statement.
* Evaluation
1. Use conditional statements for the following.
Given a variable ``time'', print ``Good Morning'' if it is less
than 12, otherwise print ``Hello''.
2. Convert the if else ladder below into a ternary conditional
statement.
#+begin_src python
x = 20
if x > 10:
print x * 100
else:
print x
#+end_src
* Solutions
1.
#+begin_src python
if time < 12:
print "Good Morning"
else:
print "Hello"
#+end_src
2.
#+begin_src python
print x * 100 if x > 10 else x
#+end_src
*
#+begin_latex
\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_latex
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