KTurtle/C3/Question-Glues/English-timed

Time	Narration
00:01	Hello and welcome to the spoken tutorial on Question Glues in KTurtle.
00:08	In this tutorial, we will learn the following question glues and, not.
00:16	To record this tutorial, I am using: Ubuntu Linux OS version 12.04 KTurtle version 0.8.1 beta.
00:29	We assume that you have basic working knowledge of KTurtle and “if-else” statement in KTurtle.
00:39	If not, for relevant tutorials, please visit our website: http://spoken-tutorial.org
00:46	Before proceeding, let me explain about question glue words.
00:51	Question glue words enable us to glue small questions into one big question.
01:00	“and”, “or” and “not” are some glue words. Glue words are used together with 'if-else' conditions.
01:11	Let's open a new KTurtle Application.
01:15	Click on Dash home.
01:18	In the Search bar, type: "kturtle"
01:22	and click on the option.
01:24	Let's begin the tutorial with glue word "and".
01:28	I already have a program in a text-editor.
01:33	Let me copy the code from the text editor and paste it into KTurtle editor.
01:40	Please pause the tutorial here and type the program into your KTurtle editor.
01:46	Resume the tutorial after typing the program.
01:50	Let me zoom into the program text.
01:52	It may possibly be a little blurred.
01:56	Let's look at the code.
01:59	reset command sets Turtle to its default position.
02:04	Message in a program is given within double quotes after the keyword "message" .
02:10	“message” command takes string as input.
02:14	It shows a pop-up dialog-box containing text from the string and also generates a beep for non-null strings.
02:24	$a, $b and $c are variables that store user input.
02:30	“ask” command prompts for user input, to be stored in variables.
02:36	if(($a+$b>$c) and ($b+$c>$a) and ($c+$a>$b), checks the “if” condition.
02:49	When the two questions glued with “and” are true, result is true.
02:55	'if(($a != $b) and ($b != $c) and ($c != $a)) checks the "if" condition.
03:05	when 'if' condition above is true, control moves into nested if block.
03:12	It checks whether sides of triangle are unequal.
03:17	fontsize 18 sets the font-size used by print command.
03:22	go 10,100 commands Turtle to go 10 pixels from left of canvas and 100 pixels from top of canvas.
03:35	print command displays the string after checking the 'if' condition.
03:41	'else' command checks else condition when 'if' condition in the block is false.
03:48	'print' command displays the string after checking the else condition.
03:54	'else' command checks the final condition.
03:57	Here, else is checked only when above conditions are false.
04:03	print command displays the string after checking the 'else' condition. I will run the code to check all the conditions.
04:12	Let's click on the Run button to run the program.
04:15	A message dialog-box pops-up. Let me click OK.
04:20	Let's enter 5 for length of AB and click OK,
04:25	8 for length of BC and click OK,
04:29	9 for length of AC and click OK.
04:33	“A scalene triangle” is displayed on the canvas.
04:37	Let's run again.
04:40	A message dialog-box pops up. Let me click OK.
04:44	Let's enter 5 for length of 'AB' and click OK, 6 for length of 'BC' and click OK, 6 for length of 'AC' and click OK.
04:58	“Not a scalene triangle” is displayed on the canvas.
05:02	Let's run again to check default condition.
05:06	A message dialog-box pops up. Let me click OK.
05:11	Let's enter 1 for length of 'AB' and click OK,
05:16	1 for length of 'BC' and click OK,
05:20	2 for length of 'AC' and click OK.
05:24	"Does not satisfy triangle's inequality" is displayed on the canvas.
05:30	Let's now clear this program. Let me type "clear" command and run. clear command cleans the canvas.
05:40	Let's next work with "not" condition.
05:43	Let me copy the program from the text-editor and paste it into KTurtle editor.
05:51	Please pause the tutorial here and type the program into your KTurtle editor.
05:56	Resume the tutorial after typing the program.
06:01	Let me zoom into the program text and explain the program.
06:05	reset command sets Turtle to default position.
06:09	$a, $b and $c are variables that store user input.
06:15	if not(($a==$b)and($b==$c)and ($c==$a)) checks the if not condition.
06:27	"not" is a special question glue-word. It inverses the logical state of its operand.
06:36	e.g. If the given condition is "true", "not" makes it "false"
06:42	and when the condition is false, the output will be true.
06:48	print command displays the string after checking the if not condition.
06:55	else command is executed when if condition is false.
07:01	print command displays the string after checking the else condition.
07:07	go 100,100 commands Turtle to go 100 pixels from left of canvas and 100 pixels from top of canvas.
07:20	repeat 3{turnright 120 forward 100} commands turtle to draw an equilateral triangle on the canvas.
07:32	Let me run the program to check all the conditions.
07:36	Press F5 key to run the code.
07:40	Enter 6 for length of AB and click OK.
07:45	Enter 5 for length of BC and click OK.
07:48	Enter 7 for length of AC and click OK.
07:54	“Triangle is not equilateral” is displayed on the canvas.
07:58	Let's run again. Let's enter 5 for length of AB and click OK,
08:05	5 for length of BC and click OK,
08:09	5 for length of AC and click OK.
08:13	“Triangle is equilateral” is displayed on the canvas. An equilateral triangle is drawn on the canvas.
08:21	With this we come to the end of this tutorial.
08:25	Let's summarize.
08:28	In this tutorial, we have learnt the question glues- "and", "not".
08:35	As an assignment, I would like you to write program to determine-
08:40	Angle concept for right angled triangle using question glue “or”
08:48	Structure of "if or" condition is:
08:51	if within brackets condition or within brackets condition or within brackets condition.
08:59	Within curly brackets do something
09:02	else within curly brackets do something.
09:06	Watch the video available at this URL: http://spoken-tutorial.org/What_is_a_Spoken-Tutorial
09:10	It summarizes the Spoken Tutorial project.
09:13	If you do not have good bandwidth, you can download and watch it.
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09:34	Spoken Tutorial project is a part of the Talk to a Teacher project.
09:38	It is supported by the National Mission on Education through ICT, MHRD, Government of India.
09:44	More information on this mission is available at this link: http://spoken-tutorial.org/NMEICT-Intro.
09:49	This is Madhuri Ganpathi from IIT Bombay, signing off. Thank you for joining.

Contributors and Content Editors

Devraj, Madhurig, PoojaMoolya, Pratik kamble, Sandhya.np14, Sneha