KTurtle/C3/Programming-Concepts/English-timed

Time	Narration
00:01	Hello Everybody.
00:03	Welcome to this tutorial on Programming concepts in KTurtle.
00:08	In this tutorial, we will learn how to:
00:12	* Write a program in 'KTurtle'
00:15	* Use variables to store user input
00:18	* Use "print" command to print on canvas
00:22	* Comment a line.
00:24	To record this tutorial, I am using: Ubuntu Linux OS Version 11.10 KTurtle version 0.8.1 beta.
00:37	We assume that you have basic working knowledge of KTurtle.
00:43	If not, for relevant tutorials, please visit our website: http://spoken-tutorial.org
00:49	Before proceeding, we will discuss some basic information about KTurtle.
00:55	Turtle displayed on the canvas is called "sprite".
01:00	"Sprite" is a small image that moves around the screen. e.g. cursor is a sprite.
01:10	"spritehide" command hides Turtle from canvas.
01:15	"spriteshow" command shows Turtle, if it is hidden.
01:21	"clear" command cleans all drawings from canvas.
01:27	In KTurtle,
01:29	"$" (Doller) sign is a container of variables.
01:34	"*" (asterisk) is used for multiplication of two numbers.
01:41	"^" (caret) raises a power of the number.
01:45	"#" (hash) sign comments a line written after it.
01:50	"sqrt" is an inbuilt function to find square root of a number.
01:58	Let's open new KTurtle Application.
02:02	Click on Dash home >> Media Apps.
02:07	Under Type, choose Education and KTurtle.
02:13	KTurtle application opens.
02:20	We can also open KTurtle using terminal.
02:24	Press Ctrl+Alt+T keys simultaneously to open the terminal.
02:30	Type kturtle and press Enter. 'KTurtle' Application opens.
02:41	Let me type and explain the program code.
02:46	Let me zoom into the program text, it may possibly be a little blurred.
02:55	#program to find square of a number. Press Enter.
03:15	"#" sign comments a line written after it.
03:19	This means, this line will not be executed while running the program. Press Enter.
03:29	reset
03:30	reset command sets Turtle to default position. Press Enter.
03:38	$i= ask within double quotes "enter a number for i and click OK".
03:58	"$i" is a variable to store user input.
04:03	“ask” command asks for user input to be stored in variable. Press Enter.
04:11	“fontsize” space 28.
04:17	fontsize sets the font-size used by print.
04:20	fontsize takes number as input, set in pixels.
04:27	print $i*$i
04:36	print $i*$i calculates and prints square of a number. press Enter.
04:45	spritehide
04:48	spritehide hides Turtle from canvas.
04:53	Let us run the program now.
04:56	Click on the Run button on the toolbar to start execution of the code in the editor.
05:03	It shows a list of execution speeds.
05:07	Full speed (no highlighting and inspector)
05:10	Full speed, slow, slower, slowest and step-by-step.
05:17	Let me run the code at Slow speed.
05:21	An input bar appears.
05:23	Let's enter 15 for 'i' and click OK.
05:29	Square of 15 = 225 is displayed on the canvas.
05:35	Let's now learn to find nth power of a number through a program.
05:42	I already have program in a text-editor.
05:46	Let me copy the program from text editor and paste it into KTurtle editor.
05:56	Please pause the tutorial here and copy the program into your KTurtle editor.
06:03	Let me zoom into the program text.
06:07	Explain the program.
06:09	# sign comments a line written after it.
06:13	reset command sets Turtle to default position.
06:18	$i and $n are variables to store user input.
06:25	“ask” command asks for user input to be stored in variables.
06:31	fontsize 28 sets the font-size used by print.
06:37	fontsize takes number as input, sets in pixels.
06:43	print ($i^$n) calculates & prints nth power of a number ($i).
06:52	spritehide hides Turtle from canvas.
06:57	Let's run the program.
07:00	Let's enter 5 for 'i' and click OK
07:05	Let's enter 4 for 'n' and click OK. 5^4=625 is displayed on the canvas.
07:18	Next, let's use inbuilt “sqrt” function in a program to find square root of a number.
07:27	Let me copy the code from text-editor and paste it into KTurtle's editor.
07:35	Please pause the tutorial here and copy the program into your KTurtle editor.
07:43	Let me zoom the program text, it may possibly be a little blurred.
07:49	Let me explain the code now.
07:52	'#' hyash sign comments a line written after it.
07:57	reset command sets Turtle to default position.
08:02	$i is a variable to store user input.
08:07	fontsize 28 sets the font-size used by print.
08:12	print sqrt $i prints square root of a number.
08:19	spritehide hides Turtle from canvas.
08:24	Let me run the program now.
08:28	Let's enter 169 for 'i' and click OK.
08:34	Square root of 169 = 13 is displayed on canvas.
08:39	Let's run again.
08:42	Let's enter -169 for 'i' and click OK.
08:49	If we enter a negative number, output is "nan". It means "not a number"
08:56	as square root of a negative number is not a real number.
09:02	Let's next evaluate cube-root of a positive number through a program.
09:08	Let me copy the program from text-editor and paste it into KTurtle's editor.
09:19	Please pause the tutorial here and copy the program into your KTurtle editor.
09:25	Let me zoom into the program text, it may possibly be a little blurred.
09:31	Let me explain the program.
09:35	'#' hyash sign comments a line written after it.
09:38	Please note, this is a single line comment.
09:42	Every comment must be preceded by a '#' sign.
09:48	reset command sets the Turtle to default position.
09:53	$i and $C are variables to store user input.
09:59	$C=($i)^(1/3), calculates cube-root of a number.
10:07	fontsize 28 sets the font-size used by print.
10:13	print $C prints cube-root of a number.
10:19	spritehide hides Turtle from canvas.
10:23	Let's run the program.
10:27	Let's enter 343 for 'i' and click OK.
10:34	Cube root of 343 = 7 is displayed on the canvas.
10:40	With this, we come to the end of this tutorial.
10:43	Let us summarize.
10:46	In this tutorial, we have learnt:
10:49	* Programming concepts
10:52	* Use of "sqrt" function
10:55	* Use of "print" command
10:57	* Using KTurtle editor and canvas.
11:02	As an assignment, I would like you to use basic programming commands to find:
11:08	* Cube of a number
11:11	* nth root of a number.
11:15	Watch the video available at this URL: http://spoken-tutorial.org/What_is_a_Spoken-Tutorial
11:19	It summarizes the Spoken Tutorial project.
11:22	If you do not have good bandwidth, you can download and watch it.
11:27	The Spoken Tutorial Project team:
11:29	* Conducts workshops using spoken tutorials.
11:32	* Gives certificates to those who pass an online test.
11:35	For more details, please write to: contact@spoken-tutorial.org
11:44	Spoken Tutorial project is a part of the Talk to a Teacher project.
11:48	It is supported by the National Mission on Education through ICT, MHRD, Government of India.
11:55	More information on this mission is available at this link: http://spoken-tutorial.org/NMEICT-Intro
11:59	This is Madhuri Ganpathi from IIT Bombay, signing off. Thank you for joining.

Contributors and Content Editors

Kaushik Datta, Madhurig, PoojaMoolya, Pratik kamble, Sandhya.np14, Sneha