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Diffstat (limited to 'getting_started_with_functions/slides.org')
| -rw-r--r-- | getting_started_with_functions/slides.org | 163 |
1 files changed, 85 insertions, 78 deletions
diff --git a/getting_started_with_functions/slides.org b/getting_started_with_functions/slides.org index 8e45b59..e3ed4b5 100644 --- a/getting_started_with_functions/slides.org +++ b/getting_started_with_functions/slides.org @@ -18,7 +18,7 @@ #+LaTeX_HEADER: commentstyle=\color{red}\itshape, stringstyle=\color{darkgreen}, #+LaTeX_HEADER: showstringspaces=false, keywordstyle=\color{blue}\bfseries} -#+TITLE: Getting started with functions +#+TITLE: #+AUTHOR: FOSSEE #+EMAIL: info@fossee.in #+DATE: @@ -29,25 +29,43 @@ #+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 -* Outline - - Define functions - - Pass arguments to functions - - Learn about docstrings - - Return values from functions +* + #+begin_latex +\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_latex +* Objectives + At the end of this tutorial, you will be able to, + + - Define a function. + - Define functions with arguments. + - Learn about docstrings. + - Learn about function return value. + - Read and understand code. + +* Pre-requisite +Spoken tutorial on - +- Conditionals. +- Loops. * Function - Eliminate code redundancy - Help in code reuse - Subroutine - relatively independent of remaining code -* ~f(x)~ a mathematical function - - $f(x) = x^{2}$ - - : f(1) -> 1 - : f(2) -> 4 - * Define ~f(x)~ in Python #+begin_src python def f(x): @@ -60,44 +78,13 @@ * Exercise 1 - Write a python function named ~cube~ which computes the cube of a given + - Write a python function named ~cube~ which computes the cube of a given number ~n~. - - - Pause here and try to solve the problem yourself. - -* Solution - #+begin_src python - def cube(n): - return n**3 - #+end_src - -* ~greet~ function - - Function ~greet~ which will print ~Hello World!~. - #+begin_src python - def greet(): - print "Hello World!" - #+end_src - - Call the function ~greet~ - : In []: greet() - : Hello World! * Exercise 2 - Write a python function named ~avg~ which computes the average of + - Write a python function named ~avg~ which computes the average of ~a~ and ~b~. - - - Pause here and try to solve the problem yourself. - -* Solution 2 - #+begin_src python - def avg(a,b): - return (a + b)/2 - #+end_src - - - ~a~ and ~b~ are parameters - - ~def f(p1, p2, p3, ... , pn)~ - * Docstring - Documenting/commenting code is a good practice @@ -114,32 +101,19 @@ - Documentation : avg? * Exercise 3 - Add docstring to the function f. + - Add docstring to the function f. * Solution 3 - -#+begin_src python - def f(x): - """Accepts a number x as argument and, - returns the square of the number x.""" - return x*x +#+begin_src Python +def f(x): + """Accepts a number x as argument and, + returns the square of the number x.""" + return x*x #+end_src - * Exercise 4 - Write a python function named ~circle~ which returns the area and + - Write a python function named ~circle~ which returns the area and perimeter of a circle given radius ~r~. -* Solution 4 -#+begin_src python - 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_src - * ~what~ #+begin_src python @@ -152,7 +126,7 @@ return True #+end_src -* ~even_digits~ +* ~even\_digits~ #+begin_src python def even_digits( n ): """returns True if all the digits of number @@ -175,7 +149,7 @@ return i * i == n, i #+end_src -* ~is_perfect_square~ +* ~is\_perfect\_square~ #+begin_src python def is_perfect_square( n ): """returns True and square root of n, @@ -189,23 +163,56 @@ #+end_src * Summary - - Functions in Python - - Passing parameters to a function - - Returning values from a function + In this tutorial, we have learnt to, + + - Define functions in Python by using the keyword ``def''. + - Call the function by specifying the function name. + - Assign a docstring to a function by putting it as a triple quoted string. + - Pass parameters to a function. + - Return values from a function. + +* Evaluation +1. What will the function do? +#+begin_src Python +def what(x) + return x*x +#+end_src + + - Returns the square of x + - Returns x + - Function doesn't have docstring + - Error - - We also did few code reading exercises. +2. How many arguments can be passed to a python function? -* Thank you! + - None + - One + - Two + - Any + +3. Write a function which calculates the area of a rectangle. +* Solutions +1. Error + +2. Any + +3. +#+begin_src Python +def area(l,b): + return l * b +#+end_src +* #+begin_latex \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_latex + |