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

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||"Sprite" is a small image that moves around the screen.e.g. Cursor is a sprite.  
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||"spritehide" command hides '''Turtle''' from canvas.  
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||Let's open new '''KTurtle''' Application  
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||'''Under Type, Choose Education''' and '''KTurtle'''.  
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||Press '''CTRL+ALT+T''' simultaneously to open the terminal.  
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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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||'''#program to find square of a number'''. Press enter
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||This means, this line will not be executed while running the program. Press enter.  
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||'''“ask”''' command asks for user input to be stored in variable.press enter
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||'''“ask”''' command asks for user input to be stored in variable. Press '''Enter'''.
 
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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 us Run the program now.
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||Let me run the code at '''slow''' speed.
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||An "input bar" appears  
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||An '''input bar''' appears.
 
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||let's enter 15 for i  and click OK
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||Let's enter 15 for 'i' and click '''OK'''.
 
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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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||05:35
 
||05:35

Revision as of 14:50, 18 September 2015

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 "$" 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 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 $n are variables to store user input.
06:25 “ask” command asks for user input to be stored in variables.
06:31 fontsize 28 sets the font size used by print.
06:37 Fontsize takes number as input, set in pixels.
06:43 print ($i^$n) calculates & prints nth power of a number.
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 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 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.
07:52 # 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 negative number, output is 'nan' it means not a number.
08:56 As square root of 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 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 # 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 be displayed on 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 URLhttp://spoken-tutorial.org/What is a Spoken Tutorial
11:19 It summarises 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 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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