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

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{|border =1
 
{|border =1
−
!Visual Cue
+
|'''Time'''
−
!Narration
+
|'''Narration'''
 +
 
 
|-
 
|-
−
||00.01
+
||00:01
 
||Hello Everybody.
 
||Hello Everybody.
 
    
 
    
 
|-
 
|-
−
||00.03
+
||00:03
 
||Welcome to this tutorial on '''Programming concepts''' in '''KTurtle'''.  
 
||Welcome to this tutorial on '''Programming concepts''' in '''KTurtle'''.  
  
 
|-
 
|-
−
||00.08
+
||00:08
−
||In this tutorial, we will learn how to  
+
||In this tutorial, we will learn how to:
  
 
|-
 
|-
−
||00.12
+
||00:12
−
||Write a program in KTurtle  
+
||Write a program in 'KTurtle'
  
 
|-
 
|-
−
||00.15
+
||00:15
 
||Use variables to store user input  
 
||Use variables to store user input  
  
 
|-
 
|-
−
||00.18
+
||00:18
−
||Use print command to print on canvas  
+
||Use '''"print" command''' to print on '''canvas'''
  
 
|-
 
|-
−
||00.22
+
||00:22
−
||Comment a line  
+
||'''Comment''' a line.
  
 
|-
 
|-
−
|| 00.24  
+
|| 00:24  
−
||To record this tutorial, I am using,Ubuntu Linux OS Version 11.10. KTurtle version 0.8.1 beta.  
+
||To record this tutorial, I am using:
 +
'''Ubuntu Linux OS''' Version '''11.10'''
 +
'''KTurtle''' version '''0.8.1 beta'''.  
 +
 
 
|-
 
|-
−
||00.37
+
||00:37
 
||We assume that you have basic working knowledge of '''KTurtle'''.  
 
||We assume that you have basic working knowledge of '''KTurtle'''.  
  
 
|-
 
|-
−
||00.43
+
||00:43
−
||If not, for relevant tutorials, please visit our website, '''http://spoken-tutorial.org'''.
+
||If not, for relevant tutorials, please visit our website:
 +
http://spoken-tutorial.org
 +
 
 
|-
 
|-
−
||00.49
+
||00:49
 
||Before proceeding, we will discuss some basic information about '''KTurtle'''.  
 
||Before proceeding, we will discuss some basic information about '''KTurtle'''.  
 +
 
|-
 
|-
−
||00.55
+
||00:55
−
||"Turtle" displayed on the canvas is called "sprite".  
+
||Turtle displayed on the canvas is called "sprite".  
 +
 
 
|-
 
|-
−
||01.00
+
||01:00
−
||"Sprite" is a small image that moves around the screen.e.g. Cursor is a sprite.  
+
||"Sprite" is a small image that moves around the screen. e.g. cursor is a sprite.  
 +
 
 
|-
 
|-
−
||01.10
+
||01:10
 
||"spritehide" command hides '''Turtle''' from canvas.  
 
||"spritehide" command hides '''Turtle''' from canvas.  
 +
 
|-
 
|-
−
||01.15
+
||01:15
−
||"spriteshow" command shows '''Turtle''' if it is hidden.  
+
||"spriteshow" command shows '''Turtle''', if it is hidden.  
  
 
|-
 
|-
−
||01.21
+
||01:21
 
||"clear" command cleans all drawings from canvas.  
 
||"clear" command cleans all drawings from canvas.  
 +
 
|-
 
|-
−
||01.27
+
||01:27
 
||In '''KTurtle''',  
 
||In '''KTurtle''',  
 +
 
|-
 
|-
−
||01.29
+
||01:29
−
||"$ " sign is a container of variables.  
+
||"$" (Doller) sign is a container of variables.  
  
 
|-
 
|-
−
||01.34
+
||01:34
−
||"*"(asterisk) is used for multiplication of two numbers.  
+
||"*" (asterisk) is used for multiplication of two numbers.  
 +
 
 
|-
 
|-
−
||01.41
+
||01:41
−
||"^"(caret) raises a power of the number.  
+
||"^" (caret) raises a power of the number.  
  
 
|-
 
|-
−
||01.45
+
||01:45
−
||"#"(hash) sign comments a line written after it.  
+
||"#" (hash) sign comments a line written after it.  
  
 
|-
 
|-
−
||01.50
+
||01:50
 
||"sqrt" is an inbuilt function to find square root of a number.  
 
||"sqrt" is an inbuilt function to find square root of a number.  
 +
 
|-
 
|-
−
||01.58
+
||01:58
−
||Let's open new '''KTurtle''' Application
+
||Let's open new '''KTurtle Application'''.
 +
 
 
|-
 
|-
−
||02.02
+
||02:02
 
||Click on '''Dash home >> Media Apps'''.  
 
||Click on '''Dash home >> Media Apps'''.  
  
 
|-
 
|-
−
||02.07
+
||02:07
−
||'''Under Type, Choose Education''' and '''KTurtle'''.  
+
||Under '''Type''', choose '''Education''' and '''KTurtle'''.  
 +
 
 
|-
 
|-
−
||02.13
+
||02:13
 
||'''KTurtle''' application opens.  
 
||'''KTurtle''' application opens.  
 +
 
|-
 
|-
−
||02.20
+
||02:20
−
||We can also open '''KTurtle''' using '''terminal'''.  
+
||We can also open KTurtle using '''terminal'''.  
 +
 
 
|-
 
|-
−
||02.24
+
||02:24
−
||Press '''CTRL+ALT+T''' simultaneously to open the terminal.  
+
||Press '''Ctrl+Alt+T''' keys simultaneously to open the terminal.  
 +
 
 
|-
 
|-
−
||02.30
+
||02:30
−
||Type '''KTurtle''' and press enter, '''KTurtle''' Application opens.  
+
||Type '''kturtle''' and press '''Enter'''. 'KTurtle' Application opens.  
 +
 
 
|-
 
|-
−
||02.41
+
||02:41
 
||Let me type and explain the program code.  
 
||Let me type and explain the program code.  
 +
 
|-
 
|-
−
||02.46
+
||02:46
 
||Let me zoom into the program text, it may possibly be a little blurred.  
 
||Let me zoom into the program text, it may possibly be a little blurred.  
 +
 
|-
 
|-
−
||02.55
+
||02:55
−
||'''#program to find square of a number'''. Press enter
+
||'''#program to find square of a number'''. Press '''Enter'''.
  
 
|-
 
|-
−
||03.15
+
||03:15
 
||"#" sign comments a line written after it.  
 
||"#" sign comments a line written after it.  
 +
 
|-
 
|-
−
||03.19
+
||03:19
−
||This means, this line will not be executed while running the program. Press enter.  
+
||This means, this line will not be executed while running the program. Press '''Enter'''.  
  
 
|-
 
|-
−
||03.29
+
||03:29
−
||'''reset'''
+
||'''reset''','''reset''' command sets '''Turtle''' to default position. Press '''Enter'''.
  
 
|-
 
|-
−
||03.30
+
||03:38
−
||reset command sets Turtle to default position. Press enter.
+
||'''$i= ask''' within double quotes "enter a number for i and click OK".  
−
|-
+
−
||03.38
+
−
||'''$i= ask''' within double quotes '''enter a number for i and click OK'''.  
+
  
 
|-
 
|-
−
||03.58
+
||03:58
 
||"$i" is a variable to store user input.  
 
||"$i" is a variable to store user input.  
 +
 
|-
 
|-
−
||04.03
+
||04:03
−
||'''“ask”''' command asks for user input to be stored in variable.press enter
+
||'''“ask”''' command asks for user input to be stored in variable. Press '''Enter'''.
 +
 
 
|-
 
|-
−
||04.11
+
||04:11
 
||'''“fontsize”''' space '''28'''.
 
||'''“fontsize”''' space '''28'''.
  
 
|-
 
|-
−
||04.17
+
||04:17
−
||'''fontsize''' sets the font size used by print.  
+
||'''fontsize''' sets the font-size used by print.  
 +
 
 
|-
 
|-
−
||04.20
+
||04:20
−
||Fontsize takes number as input, set in pixels.  
+
||'''fontsize''' takes number as input, set in pixels.  
 +
 
 
|-
 
|-
−
|04.27
+
|04:27
 
||'''print $i*$i'''   
 
||'''print $i*$i'''   
  
 
|-
 
|-
−
||04.36
+
||04:36
−
||'''print $i*$i''' calculates and prints square of a number. press enter.  
+
||'''print $i*$i''' calculates and prints square of a number. press '''Enter'''.  
  
 
|-
 
|-
−
||04.45
+
||04:45
 
||'''spritehide'''
 
||'''spritehide'''
  
 
|-
 
|-
−
||04.48
+
||04:48
 
||'''spritehide''' hides '''Turtle''' from canvas.
 
||'''spritehide''' hides '''Turtle''' from canvas.
 +
 
|-
 
|-
−
||04.53
+
||04:53
−
||Let us Run the program now.
+
||Let us '''run''' the program now.
 +
 
 
|-
 
|-
−
||04.56
+
||04:56
 
||Click on the '''Run''' button on the toolbar to start execution of the code in the editor.
 
||Click on the '''Run''' button on the toolbar to start execution of the code in the editor.
 +
 
|-
 
|-
−
||05.03
+
||05:03
 
||It shows a list of execution speeds.  
 
||It shows a list of execution speeds.  
 +
 
|-
 
|-
−
||05.07
+
||05:07
−
||'''Full speed(no highlighting and inspector)'''
+
||'''Full speed (no highlighting and inspector)'''
 +
 
 
|-
 
|-
−
||05.10
+
||05:10
 
||'''Full speed''',  
 
||'''Full speed''',  
 
'''slow''',  
 
'''slow''',  
Line 180: Line 209:
 
'''slowest''' and
 
'''slowest''' and
 
'''step-by-step'''.
 
'''step-by-step'''.
 +
 
|-
 
|-
−
||05.17
+
||05:17
−
||Let me run the code at '''slow''' speed.
+
||Let me '''run''' the code at '''Slow''' speed.
 +
 
 
|-
 
|-
−
||05.21
+
||05:21
−
||An "input bar" appears  
+
||An '''input bar''' appears.
 +
 
 
|-
 
|-
−
||05.23
+
||05:23
−
||let's enter 15 for i  and click OK
+
||Let's enter 15 for 'i' and click '''OK'''.
 +
 
 
|-
 
|-
−
||05.29
+
||05:29
−
||square of '15'  = '225' is displayed on the canvas.
+
||Square of '''15'''  = '''225''' is displayed on the canvas.
 +
 
 
|-
 
|-
−
||05.35
+
||05:35
 
||Let's now learn to find nth power of a number through a  program.
 
||Let's now learn to find nth power of a number through a  program.
 +
 
|-
 
|-
−
||05.42
+
||05:42
−
||I already have program  in a text editor.  
+
||I already have program  in a text-editor.  
 +
 
 
|-
 
|-
−
|05.46
+
||05:46
 
||Let me copy the program from text editor and paste it into  '''KTurtle''' editor.  
 
||Let me copy the program from text editor and paste it into  '''KTurtle''' editor.  
−
 
  
 
|-
 
|-
−
||05.56
+
||05:56
 
||Please pause the tutorial here and copy the program into your '''KTurtle''' editor.  
 
||Please pause the tutorial here and copy the program into your '''KTurtle''' editor.  
 +
 
|-
 
|-
−
|| 06.03
+
||06:03
 
||Let me zoom into the program text.
 
||Let me zoom into the program text.
 +
 
|-
 
|-
−
||06.07
+
||06:07
 
||Explain the program.
 
||Explain the program.
 +
 
|-
 
|-
−
|06.09
+
|06:09
 
||# sign comments a line written after it.
 
||# sign comments a line written after it.
 +
 
|-
 
|-
−
||06.13
+
||06:13
 
||'''reset''' command sets '''Turtle''' to '''default''' position.
 
||'''reset''' command sets '''Turtle''' to '''default''' position.
 +
 
|-
 
|-
−
||06.18
+
||06:18
 
||'''$i''' and '''$n''' are variables to store user input.
 
||'''$i''' and '''$n''' are variables to store user input.
 +
 
|-
 
|-
−
||06.25
+
||06:25
 
||'''“ask”''' command asks for user input to be stored in variables.
 
||'''“ask”''' command asks for user input to be stored in variables.
 +
 
|-
 
|-
−
||06.31
+
||06:31
−
||'''fontsize 28'''  sets the font size used by print.  
+
||'''fontsize 28'''  sets the font-size used by print.  
 +
 
 
|-
 
|-
−
||06.37
+
||06:37
−
||Fontsize takes number as input, set in pixels.
+
||'''fontsize''' takes number as input, sets in pixels.
 +
 
 
|-
 
|-
−
||06.43
+
||06:43
−
||'''print ($i^$n)''' calculates & prints nth power of a number.  
+
||'''print ($i^$n)''' calculates & prints nth power of a number ($i).  
 +
 
 
|-
 
|-
−
||06.52
+
||06:52
 
||'''spritehide''' hides '''Turtle''' from canvas.
 
||'''spritehide''' hides '''Turtle''' from canvas.
 +
 
|-
 
|-
−
||06.57
+
||06:57
−
||Let's run the program.
+
||Let's '''run''' the program.
  
 
|-
 
|-
−
||07.00
+
||07:00
−
||Let's enter '5' for i, and click OK
+
||Let's enter 5  for 'i' and click '''OK'''
 +
 
 
|-
 
|-
−
||07.05
+
||07:05
−
||Let's enter  '4' for n, and click OK. 5^4=625  is displayed on canvas.  
+
||Let's enter  4 for 'n' and click OK. 5^4='''625''' is displayed on the canvas.  
 +
 
 
|-
 
|-
−
||07.18
+
||07:18
−
||Next, let's use inbuilt '''“sqrt”''' function in a program to find square root of a number.
+
||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.  
+
  
 +
|-
 +
||07:27
 +
||Let me copy the code from text-editor and paste it into  KTurtle's editor.
  
 
|-
 
|-
−
||07.35
+
||07:35
 
||Please pause the tutorial here and copy the program into your '''KTurtle''' editor.  
 
||Please pause the tutorial here and copy the program into your '''KTurtle''' editor.  
  
 
|-
 
|-
−
||07.43
+
||07:43
−
||Let me zoom the program text it may possibly be a little blurred.
+
||Let me zoom the program text, it may possibly be a little blurred.
 +
 
 
|-
 
|-
−
||07.49
+
||07:49
−
||Let me explain the code.
+
||Let me explain the code now.
  
 
|-
 
|-
−
|| 07.52
+
||07:52
−
||# sign comments a line written after it .  
+
||'#' hyash sign comments a line written after it.  
 +
 
 
|-
 
|-
−
||07.57
+
||07:57
 
||'''reset''' command sets '''Turtle''' to '''default''' position.
 
||'''reset''' command sets '''Turtle''' to '''default''' position.
 +
 
|-
 
|-
−
||08.02
+
||08:02
 
||'''$i''' is a variable to store user input.
 
||'''$i''' is a variable to store user input.
 +
 
|-
 
|-
−
||08.07
+
||08:07
−
||'''fontsize 28'''  sets the font size used by print.
+
||'''fontsize 28'''  sets the font-size used by '''print'''.
 +
 
 
|-
 
|-
−
||08.12
+
||08:12
 
||'''print sqrt $i''' prints square root of a number.  
 
||'''print sqrt $i''' prints square root of a number.  
 +
 
|-
 
|-
−
||08.19
+
||08:19
 
||'''spritehide''' hides '''Turtle''' from canvas.
 
||'''spritehide''' hides '''Turtle''' from canvas.
 +
 
|-
 
|-
−
||08.24
+
||08:24
−
||Let me run the program now.
+
||Let me '''run''' the program now.
 +
 
 
|-
 
|-
−
||08.28
+
||08:28
−
||Let's enter  '169'  for i, and click OK
+
||Let's enter  '''169'''  for 'i' and click '''OK'''.
 +
 
 
|-
 
|-
−
||08.34
+
||08:34
−
||square root of 169 = 13, is displayed on canvas.
+
||Square root of 169 = '''13''' is displayed on canvas.
  
 
|-
 
|-
−
||08.39
+
||08:39
−
||Let's  run again,
+
||Let's  '''run''' again.
 +
 
 
|-
 
|-
−
||08.42
+
||08:42
−
||let's enter -169  for i and click OK.
+
||Let's enter '''-169''' for 'i' and click '''OK'''.
 +
 
 
|-
 
|-
−
||08.49
+
||08:49
−
||If we enter negative number, output is ''''nan''''  it means not a number.
+
||If we enter a negative number, output is "nan". It means "not a number"
 +
 
 
|-
 
|-
−
||08.56
+
||08:56
−
||As square root of negative number is not a real number.
+
||as square root of a negative number is not a real number.
 +
 
 
|-
 
|-
−
||09.02
+
||09:02
−
|| let's next evaluate Cube root of a positive number through a program.
+
||Let's next evaluate cube-root of a positive number through a program.
 +
 
 
|-
 
|-
−
||09.08
+
||09:08
−
||Let me copy the program from editor and paste it into ''' KTurtle's''' editor.
+
||Let me copy the program from text-editor and paste it into KTurtle's editor.
  
 
|-
 
|-
−
||09.19
+
||09:19
 
||Please pause the tutorial here and copy the program into your '''KTurtle''' editor.  
 
||Please pause the tutorial here and copy the program into your '''KTurtle''' editor.  
 +
 
|-
 
|-
−
||09.25
+
||09:25
−
||Let me zoom into the program text it may possibly be a little blurred.
+
||Let me zoom into the program text, it may possibly be a little blurred.
 +
 
 
|-
 
|-
−
||09.31
+
||09:31
 
||Let me explain the program.
 
||Let me explain the program.
 +
 
|-
 
|-
−
||09.35
+
||09:35
−
||# sign comments a line. Written after it.
+
||'#' hyash sign comments a line written after it.
 +
 
 
|-
 
|-
−
||09.38
+
||09:38
−
||Please note this is a single line comment.  
+
||Please note, this is a '''single line comment'''.  
 +
 
 
|-
 
|-
−
||09.42
+
||09:42
−
||Every comment must be preceeded by a # sign.
+
||Every comment must be preceded by a '#' sign.
 +
 
 
|-
 
|-
−
||09.48
+
||09:48
 
||'''reset''' command sets the '''Turtle''' to '''default''' position.
 
||'''reset''' command sets the '''Turtle''' to '''default''' position.
 +
 
|-
 
|-
−
||09.53
+
||09:53
 
||'''$i''' and '''$C''' are  variables to store user input.
 
||'''$i''' and '''$C''' are  variables to store user input.
 +
 
|-
 
|-
−
||09.59
+
||09:59
−
||'''$C=($i)^(1/3)''' calculates cube root of a number.
+
||'''$C=($i)^(1/3)''', calculates cube-root of a number.
 +
 
 
|-
 
|-
−
||10.07
+
||10:07
−
||'''fontsize 28'''  sets the font size used by print.  
+
||'''fontsize 28'''  sets the font-size used by print.  
 +
 
 
|-
 
|-
−
||10.13
+
||10:13
−
||'''print $C''' prints cube root of a number.  
+
||'''print $C''' prints cube-root of a number.  
 +
 
 
|-
 
|-
−
||10.19
+
||10:19
 
||'''spritehide''' hides '''Turtle''' from canvas.
 
||'''spritehide''' hides '''Turtle''' from canvas.
 +
 
|-
 
|-
−
||10.23
+
||10:23
−
||Let's Run the program
+
||Let's '''run''' the program.
  
 
|-
 
|-
−
||10.27
+
||10:27
−
||Let's enter 343 for i and click OK
+
||Let's enter '''343''' for 'i' and click '''OK'''.
 +
 
 
|-
 
|-
−
||10.34
+
||10:34
−
||cube root of 343 = 7 is be displayed on canvas.
+
||Cube root of 343 = '''7''' is displayed on the canvas.
 
|-
 
|-
−
||10.40
+
||10:40
−
||With this we  come to the end of this tutorial.
+
||With this, we  come to the end of this tutorial.
 +
 
 
|-
 
|-
−
||10.43
+
||10:43
−
||let us summarize.
+
||Let us summarize.
 
|-
 
|-
−
||10.46
+
||10:46
−
||In this tutorial, we have learnt
+
||In this tutorial, we have learnt:
 +
 
 
|-
 
|-
−
||10.49
+
||10:49
 
||Programming concepts  
 
||Programming concepts  
  
 
|-
 
|-
−
||10.52
+
||10:52
−
|| Use of sqrt function
+
||Use of "sqrt" function
  
 
|-
 
|-
−
||10.55
+
||10:55
−
|| Use of print command  
+
||Use of "print" command  
  
 
|-
 
|-
−
||10.57
+
||10:57
 
||Using KTurtle editor and canvas.
 
||Using KTurtle editor and canvas.
 +
 
|-
 
|-
−
||11.02
+
||11:02
−
||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:
 +
 
 
|-
 
|-
−
||11.08
+
||11:08
 
||Cube of a number  
 
||Cube of a number  
  
 
|-
 
|-
−
||11.11
+
||11:11
−
|| nth root of a number
+
||nth root of a number.
 +
 
 
|-
 
|-
−
||11.15
+
||11:15
−
||Watch the video available at this URLhttp://spoken-tutorial.org/What is a Spoken Tutorial  
+
||Watch the video available at this URL:
 +
http://spoken-tutorial.org/What_is_a_Spoken-Tutorial  
  
 
|-
 
|-
−
||11.19
+
||11:19
−
||It summarises the Spoken Tutorial project  
+
||It summarizes the Spoken Tutorial project.
  
 
|-
 
|-
−
||11.22
+
||11:22
−
||If you do not have good bandwidth, you can download and watch it  
+
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 +
 
 
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||11:27
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||The Spoken Tutorial Project Team :
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||The Spoken Tutorial Project team:
  
 
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||Conducts workshops using spoken tutorials  
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||Conducts workshops using spoken tutorials.
  
 
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||11:32
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||Gives certificates to those who pass an online test  
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||Gives certificates to those who pass an online test.
  
 
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||11.35
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||For more details, please write to contact@spoken-tutorial.org
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||For more details, please write to:
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contact@spoken-tutorial.org
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||11.44
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||11:44
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||Spoken Tutorial Project is a part  of the Talk to a Teacher project.
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||'''Spoken Tutorial''' project is a part  of the '''Talk to a Teacher''' project.
  
 
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||It is supported by the National Mission on Education through ICT, MHRD, Government of India.
 
||It is supported by the National Mission on Education through ICT, MHRD, Government of India.
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||More information on this Mission is available at this http://spoken-tutorial.org/NMEICT-Intro ].
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||More information on this mission is available at this link:
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http://spoken-tutorial.org/NMEICT-Intro  
  
 
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||This is Madhuri Ganpathi, from IIT Bombay signing off.Thank you for joining.
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||This is Madhuri Ganpathi from '''IIT Bombay''', signing off. Thank you for joining.
 
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Latest revision as of 17:44, 24 March 2017

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,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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