KTurtle/C3/Control-Execution/English-timed

Time	Narration
00:01	Hello Everybody.
00:03	Welcome to this tutorial on Control Execution in KTurtle
00:10	In this tutorial, we will learn
00:13	'while' loop and
00:15	'for' loop
00:17	To record this tutorial I am using,Ubuntu Linux OS Version 12.04 KTurtle version 0.8.1 beta.
00:32	We assume that you have basic working knowledge of Kturtle.
00:38	If not, for relevant tutorials, please visit our website. http://spoken-tutorial.org
00:45	Let's open a new KTurtle Application.
00:48	Click on Dash home.
00:50	In the Search bar, type KTurtle.
00:53	Click on the option.KTurtle Application opens.
00:59	Let me first explain about what is control execution.
01:05	Control execution is controlling the flow of a program.
01:10	Different conditions are used to control program execution.
01:16	Loop is a block of code executed repeatedly till a certain condition is satisfied.
01:25	Eg. “while” loop and “for” loop
01:30	Let's begin the tutorial with “while” loop
01:34	In the “while” loop, the code inside the loop repeats till boolean evaluates to 'false'.
01:42	Let me explain the structure of “while” loop. while loop condition { do something with loop increment variable }
01:56	I already have the code in a text editor.
01:59	Let me copy the program from text editor and paste it into KTurtle editor
02:07	Please pause the tutorial here and type the program into your KTurtle editor.
02:13	Resume the tutorial after typing the program
02:18	Let me zoom into the program text it may possibly be a little blurred.
02:25	Let me explain the code.
02:27	# sign comments a line written after it.
02:32	It means, this line will not be executed while running the program.
02:38	reset command sets “Turtle” to its default position.
02:43	$x=0 initializes the value of variable x to zero.
02:52	Message in a program is given within double quotes after the keyword message " " “message” command takes “string” as input.
03:04	It shows a pop-up dialog box containing text from the string.
03:11	while $x<30 checks the “while” condition.
03:17	$x=$x+3 increments the value of variable $x by 3
03:27	fontsize 15 sets the font size used by print command.
03:35	Fontsize takes number as input, set in pixels.
03:42	forward 20 commands “Turtle” to move 20 steps forward on the canvas.
03:52	print $x displays the value of variable x on the canvas.
04:01	Let me click on the “Run” button to run the program.
04:05	A message dialog box pops up.Let me click OK.
04:11	Multiples of 3 from 3 to 30 are displayed on the canvas.
04:17	“Turtle” moves 20 steps forward on the canvas.
04:22	Let's next work with “for” loop
04:26	“for” loop is a counting loop.
04:29	Every time the code inside “for” loop is executed,
04:34	variable value is incremented, till it reaches the end value.
04:41	Let me explain the structure of “for” loop.
04:46	for variable = start number to end number { Statement}
04:55	Let me clear the current program.
04:59	Let me typeclearcommand and run to clean the canvas.
05:05	Let me copy the program from text editor and paste it into KTurtle editor
05:14	Please pause the tutorial here and type the program into your KTurtle editor.
05:20	Resume the tutorial after typing the program.
05:25	Let me zoom into the program text it may possibly be a little blurred.
05:32	Let me explain the program.
05:34	# sign comments a line written after it.
05:39	reset command sets “Turtle” to its default position.
05:44	$r=0 initializes the value of variable r to zero.
05:52	for $x= 1 to 15 checks “for” condition from 1 to 15.
06:01	$r=$x*($x+1)/2 calculates the value of variable r.
06:12	fontsize 18 sets the font size used by print command.
06:19	print $r displays the value of variable r on the canvas
06:26	forward 15 commands Turtleto moves 15 steps forward on the canvas.
06:34	go 10,250 commands Turtle to go 10 pixels from left of canvas and 250 pixels from top of canvas.
06:48	“Turtle” displays all print commands without any time gap.
06:54	“Wait 2” command makes Turtle to “wait” for 2 seconds before executing next command.
07:04	“print” command displays the “string” within double quotes and also displays variable $r.
07:13	Let me click on the “ Run” button to run the program.
07:17	A series of sum of first 15 natural numbers and sum of first 15 natural numbers is displayed on the canvas.
07:27	Turtle moves 15 steps forward on the canvas.
07:32	With this we come to the end of this tutorial.
07:37	Let us summarize.
07:40	In this tutorial we have learned to use,
07:44	“while”' loop and “for” loop
07:47	As an assignment I would like you to write programs to evaluate
07:54	Multiples of 2 using “while” loop
07:58	Multiplication table of a number using “for” loop
08:03	Watch the video available at this URLhttp://spoken-tutorial.org/What is a Spoken Tutorial
08:08	It summarises the Spoken Tutorial project
08:12	If you do not have good bandwidth, you can download and watch it
08:17	The Spoken Tutorial Project Team :
08:20	Conducts workshops using spoken tutorials
08:23	Gives certificates to those who pass an online test
08:27	For more details, please write to contact@spoken-tutorial.org
08:36	Spoken Tutorial Project is a part of the Talk to a Teacher project
08:41	It is supported by the National Mission on Education through ICT, MHRD, Government of India
08:48	More information on this Mission is available at this link http://spoken-tutorial.org/NMEICT-Intro ]
08:54	This is Madhuri Ganpathi from IIT Bombay signing off Thank you for joining.

Contributors and Content Editors

PoojaMoolya, Pratik kamble, Sandhya.np14, Sneha