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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 Getting started with \texttt{for}}
\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,
- Write blocks of code in python.
- Use the ``for`` loop.
- Use ``range()`` function.
- Write blocks in python interpreter
- Write blocks in ipython interpreter.
* Whitespace in Python
- Whitespace is significant
- blocks are visually separated
- Blocks are indented using 4 spaces
: Block A
: Block A
: Block B
: Block B
: Block A
~Block B~ is an inner block and is indented using 4 spaces
* Question 1
Write a ~for~ loop which iterates through a list of numbers and find
the square root of each number.
:
The numbers are,
: 1369, 7225, 3364, 7056, 5625, 729, 7056,
: 576, 2916
* Solution 1
- Open text editor and type the following code
#+begin_src python
numbers = [1369, 7225, 3364, 7056, 5625, 729, 7056,
576, 2916]
for each in numbers:
print "Square root of", each, "is", sqrt(each)
print "This is not in for loop!"
#+end_src
* Save \& run script
- Save the script as ~list_roots.py~
- Run in ~ipython~ interpreter as,
: In []: %run -i list_roots.py
* Question 2
Print the square root of numbers in the list.
:
Numbers are,
: 7225, 3268, 3364, 2966, 7056, 5625, 729, 5547,
: 7056, 576, 2916
* Question 3
Find out the cube of all the numbers from 1 to 10.
:
/do it in the python interpreter/
* ~range()~ function
- in built function in Python
- generates a list of integers
- /syntax:/ range([start,] stop[, step])
- /example:/
- range(1, 20) - /generates integers from 1 to 20/
- range(20) - /generates integers from 0 to 20/
* Question 4
Print all the odd numbers from 1 to 50.
* Summary
In this tutorial,we learnt to,
- Create blocks in python using ``for
- Indent the blocks of code
- Iterate over a list using ``for`` loop
- Use the ``range()`` function
* Evaluation
1. Indentation is not mandatory in Python
- True
- False
2. Write a code using ``for`` loop to print the product of all
natural numbers from 1 to 20.
3. What will be the output of-
range(1,5)
* Solutions
1. False
2. y = 1
for x in range(1,21):
y*=x
print y
3. [1,2,3,4]
*
#+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_latex
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