Difference between revisions of "KTurtle/C3/Programming-Concepts/English-timed"

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||* Use ''''print' command''' to print on canvas  
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||If not, for relevant tutorials, please visit our website: http://spoken-tutorial.org
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||If not, for relevant tutorials, please visit our website:
 +
http://spoken-tutorial.org
 
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||"Turtle" displayed on the canvas is called "sprite".  
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||Turtle displayed on the canvas is called "sprite".  
 
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||01:00
 
||01:00
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||"Sprite" is a small image that moves around the screen. e.g. Cursor is a sprite.  
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||"Sprite" is a small image that moves around the screen. e.g. cursor is a sprite.  
 
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||01:10
 
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||'''"spritehide"''' command hides '''Turtle''' from canvas.  
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||"spritehide" command hides '''Turtle''' from canvas.  
 
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||'''"spriteshow"''' command shows '''Turtle''', if it is hidden.  
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||"spriteshow" command shows '''Turtle''', if it is hidden.  
  
 
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||01:21
 
||01:21
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||'''"clear"''' command cleans all drawings from canvas.  
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||"clear" command cleans all drawings from canvas.  
 
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||"$" sign is a container of variables.  
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||"$" (Doller) sign is a container of variables.  
  
 
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||01:58
 
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||Let's open new '''KTurtle''' '''Application'''.  
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||Let's open new '''KTurtle Application'''.  
 
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||We can also open '''KTurtle''' using '''terminal'''.  
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||We can also open KTurtle using '''terminal'''.  
 
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||02:24
 
||02:24
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||Press '''Ctrl+Alt+T''' simultaneously to open the terminal.  
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||Press '''Ctrl+Alt+T''' keys simultaneously to open the terminal.  
 
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||02:30
 
||02:30
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||Type '''KTurtle''' and press '''Enter''', 'KTurtle' Application opens.  
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||Type '''kturtle''' and press '''Enter'''. 'KTurtle' Application opens.  
 
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||02:41
 
||02:41
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||Let me type and explain the '''program code'''.  
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||Let me type and explain the program code.  
 
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||03:30
 
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||'''reset''' command sets Turtle to default position. Press '''Enter'''.  
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||'''reset''' command sets '''Turtle''' to default position. Press '''Enter'''.  
 
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||03:38
 
||03:38
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||'''$i= ask''' within double quotes '''enter a number for i and click OK'''.  
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||'''$i= ask''' within double quotes "enter a number for i and click OK".  
  
 
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||04:36
 
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||'''print $i*$i''' calculates and prints square of a number. press Enter.  
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||'''print $i*$i''' calculates and prints square of a number. press '''Enter'''.  
  
 
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||Let me '''run''' the code at '''slow''' speed.
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||Let me '''run''' the code at '''Slow''' speed.
 
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||Square of '15'  = '''225''' is displayed on the canvas.
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||Square of '''15'''  = '''225''' is displayed on the canvas.
 
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||I already have program  in a text editor.  
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||I already have program  in a text-editor.  
 
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||'''fontsize 28'''  sets the font size used by print.  
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||'''fontsize 28'''  sets the font-size used by print.  
 
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||Fontsize takes number as input, sets in pixels.
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||'''fontsize''' takes number as input, sets in pixels.
 
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||Let's run the program.
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||Let's '''run''' the program.
  
 
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||Next, let's use inbuilt '''“sqrt”''' function in a program to find square root of a number.
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||Next, let's use inbuilt “sqrt” function in a program to find square root of a number.
 
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||07:27
 
||07:27
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||Let me copy the code from editor and paste it into ''' KTurtle's''' editor.  
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||Let me copy the code from text-editor and paste it into KTurtle's editor.  
  
 
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||Let me explain the code.
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||Let me explain the code now.
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|| 07:52
 
|| 07:52
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||'#' sign comments a line written after it.  
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||'#' hyash sign comments a line written after it.  
 
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||'''fontsize 28'''  sets the font size used by print.
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||'''fontsize 28'''  sets the font-size used by '''print'''.
 
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||Square root of 169 = '''13''' is displayed on canvas.
 
||Square root of 169 = '''13''' is displayed on canvas.
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||Let's  run again.
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||Let's  '''run''' again.
 
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||If we enter negative number, output is ''''nan''''. It means "not a number".
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||If we enter a negative number, output is "nan". It means "not a number"
 
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||08:56
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||As square root of negative number is not a real number.
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||as square root of a negative number is not a real number.
 
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||Let me copy the program from editor and paste it into ''' KTurtle's''' editor.
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||Let me copy the program from text-editor and paste it into KTurtle's editor.
  
 
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||'#' sign comments a line written after it.
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||'#' hyash sign comments a line written after it.
 
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||09:38
 
||09:38
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||Please note this is a '''single line comment'''.  
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||Please note, this is a '''single line comment'''.  
 
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||'''$C=($i)^(1/3)''' calculates cube-root of a number.
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||'''$C=($i)^(1/3)''', calculates cube-root of a number.
 
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||Let's '''run''' the program
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||Let's '''run''' the program.
  
 
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||10:27
 
||10:27
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||Let's enter 343 for 'i' and click '''OK'''
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||Let's enter '''343''' for 'i' and click '''OK'''.
 
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||10:34
 
||10:34
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||Cube root of 343 = '''7''' is displayed on canvas.
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||Cube root of 343 = '''7''' is displayed on the canvas.
 
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||10:40
 
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||10:52
 
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||* Use of sqrt function
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||* Use of "sqrt" function
  
 
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||10:55
 
||10:55
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||* Use of print command  
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||* Use of "print" command  
  
 
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||11:02
 
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||As an assignment, I would like you to use basic programming commands to find=
+
||As an assignment, I would like you to use basic programming commands to find:
 
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||11:08
 
||11:08
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||11:35
 
||11:35
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||For more details, please write to contact@spoken-tutorial.org
+
||For more details, please write to:
 +
contact@spoken-tutorial.org
 
|-
 
|-
 
||11:44
 
||11:44

Revision as of 16:56, 24 February 2016

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

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