Sneha: Created page with '{|border =1 !Visual Cue !Narration |- ||00.01 ||Hello everybody. |- ||00.02 ||Welcome to this tutorial on '''Grammar of TurtleScript''' in '''KTurtle'''. |- ||00.08 ||In this …'

2013-04-01T11:28:28Z

Created page with '{|border =1 !Visual Cue !Narration |- ||00.01 ||Hello everybody. |- ||00.02 ||Welcome to this tutorial on '''Grammar of TurtleScript''' in '''KTurtle'''. |- ||00.08 ||In this …'

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{|border =1
!Visual Cue
!Narration
|-
||00.01
||Hello everybody.

|-
||00.02
||Welcome to this tutorial on '''Grammar of TurtleScript''' in '''KTurtle'''.
|-
||00.08
||In this tutorial, we will learn about

|-
||00.11
|| Grammar of Turtle script and 'if'-'else' condition
|-
||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

|-
||00.35
||If not, for relevant tutorials, please visit our website. '''http://spoken-tutorial.org'''
|-
||00.40
||Let's open a new '''KTurtle''' Application.

|-
||00.43
||Click on '''Dash home'''.

|-
||00.45
||In the Search bar, type '''KTurtle.'''

|-
||00.49
||Click on the '''KTurtle''' icon.
|-
||00.52
||We can also open KTurtle using '''Terminal.'''

|-
||00.56
||Press '''CTRL+ALT+T''' simultaneously to open the '''Terminal'''.

|-
||01.01
||Type '''KTurtle''' and press enter to open the '''KTurtle''' Application.
|-
||01.08
||Let's first look at '''TurtleScript'''

|-
||01.11
|| '''TurtleScript''' is a programming language

|-
||01.15
||It has different types of '''words and symbols''' used for '''various purposes'''

|-
||01.21
|| It '''instructs''' Turtle what to do
|-
||01.25
||'''Grammar of TurtleScript''' in ''' KTurtle''' includes-

|-
||01.30
|| Comments

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||01.31
|| Commands

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||01.32
|| Numbers

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||01.33
|| Strings

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||01.34
|| Variables and

|-
||01.36
|| Boolean values
|-
||01.38
||Now we will see where to store numbers

|-
||01.42
||'''Numbers''' can be stored in

|-
||01.44
|| Mathematical operators

|-
||01.46
||Comparison operators and

|-
||01.49
||Variables
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||01.50
||I will zoom the program text for clear view.
|-
||01.54
||First let's look at variables.

|-
||01.57
||Variables are words that start with ‘$’ sign, for example $a.

|-
|| 02.04
||In the editor they are highlighted in '''purple''' color.

|-
||02.09
||Using the assignment, equal to (=), a variable is given its content.

|-
||02.14
||Variables can contain numbers '''$a=100'''.

|-
||02.20
||strings '''$a=hello''' or

|-
||02.25
||boolean values that is true or false '''$a=true'''

|-
||02.32
||Variable keeps the content until program finishes execution or until it is reassigned to something else.

|-
||02.41
||For example, consider the code.

|-
||02.44
||Let us type,'''$a = 2004'''

|-
||02.50
||'''$b = 25'''

|-
||02.55
||'''print $a + $b'''
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||03.01
||Variable 'a' is assigned a value ''' 2004.'''

|-
||03.06
||Variable 'b' is assigned a value '''25'''

|-
||03.10
||'''print''' command, commands Turtle to write something on the canvas.

|-
|| 03.15
||'''print''' command, takes numbers and strings as input.

|-
||03.19
||'''print $a + $b''' commands '''Turtle''' to add two values and display them on the canvas.
|-
|| 03.29
||Let's Run the code in '''slow''' speed.

|-
||03.34
||Value '''2029''' is displayed on the canvas
|-
||03.40
||Let us next see the Mathematical Operators.

|-
||03.44
||Mathematical operators include,

* '''+''' (Addition)

* '''-''' (Subtraction)

* '''*''' (Multiplcation) and

* '''/''' (Division)
|-
||03.53
|| I will clear the current code from editor and type '''clear''' command and '''RUN''' to clean the canvas
|-
||04.01
||I already have a program in a text editor.
|-
||04.05
||I will Explain the code now
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||04.08
||'''“reset”''' command sets Turtle to its '''default''' position
|-
||04.12
||'''canvassize 200,200''' fixes the width and height of the canvas to 200 pixels each.
|-
||04.22
|| value '''1+1''' is assigned to the variable''' $add,'''
|-
||04.26
||Value '''20-5''' is assigned to variable '''$subtract''',
|-
||04.31
||value '''15 * 2''' is be assigned to the variable '''$multiply.'''
|-
||04.36
||'''30/30''' is assigned to the variable '''$divide.'''
|-
||04.40
||'''go 10,10''' commands to '''Turtle''' to go 10 pixels left of canvas and 10 pixels from top of canvas
|-
||04.52
||'''print''' command displays the varible on the canvas
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||04.56
||I will copy the code from text editor and paste it into '''KTurtle''' editor.

|-
||05.03
||Pause the tutorial and type the program into''' KTurtle''' editor.

|-
||05.08
||Resume the tutorial after typing the program
|-
||05.13
||Let us click on '''Run''' button to run the program

|-
||05.17
||Command which is getting executed is highlighted on the editor.

|-
||05.22
||'''Turtle''' displays the values on the canvas at the specified positions.
|-
||05.34
||Let us consider a simple example for using '''comparison operator''' .

|-
|| 05.41
|| I will clear the current code from editor and type '''clear''' command and '''RUN''' to clean the canvas
|-
|| 05.49
||I will zoom the progrm text to have clear view
|-
|| 05.53
||Let's type

|-
||05.55
||'''$answer = 10 > 3'''

|-
||06.03
||'''print $answer'''

|-
||06.09
||Here 10 is compared to 3 with the ’'''greater than'''’ operator.

|-
||06.14
||The result of this comparison, the '''boolean value true''' is stored in the

|-
||06.19
||variable '''$answer''' and the value '''true''' is displayed on the canvas.
|-
|| 06.27
||Let's run the code now

|-
||06.29
||'''Turtle''' displays '''Boolean value true''' on the canvas.
|-
||06.34
||Now lets see how Strings work in this application –

|-
||06.39
||Strings can be put in variables like numbers

|-
||06.43
||Strings cannot be used in mathematical or comparison operators

|-
||06.49
||Strings are highlighted in red color

|-
||06.53
||KTurtle identifies a line in double quotes as a string
|-
|| 07.00
||I will clear the current code from editor.type '''clear''' command and '''Run''' to clean the canvas
|-
|| 07.08
||Now I will explain about Boolean values.

|-
||07.11
||There are only two '''boolean''' values: '''true''' and '''false.'''
|-
||07.16
||For example Let's type the code

|-
||07.20
||'''$answer = 7<5'''

|-
||07.28
||'''print $answer'''

|-
||07.34
||'''Boolean value false''' is assigned to variable''' $answer''' because 7 is greater than 5
|-
|| 07.43
||Let's Run the code now

|-
||07.47
||'''Turtle''' diplays '''Boolean''' value '''false''' on the canvas.
|-
|| 07.51
||Let's next learn about “if-else” conditon.

|-
||07.56
||‘if’ condition is executed only if the '''boolean''' value evaluates ‘true’

|-
||08.03
||‘else’ condition is executed only if the ‘if’ condition is ‘false’ .
|-
|| 08.09
||I will clear the current code from editor.type '''clear''' command and '''Run''' to clean the canvas
|-
||08.17
||I already have a code in a text file.
|-
|| 08.21
||This code compares numbers 4 , 5 and 6 and displays the results accordingly on the canvas.
|-
||08.30
||I will copy the code from text editor and paste it into '''KTurtle''' editor.

|-
||08.36
||Pause the tutorial and type the program into your '''KTurtle''' editor.

|-
||08.42
||Resume the tutorial after typing the program
|-
|| 08.46
||Let's Run the code now

|-
||08.49
||the '''Turtle''' has compared the values 4 and 5.

|-
||08.53
||and has displayed the result 4 is smaller than 6 on the canvas .
|-
||09.00
||With this we come to the end of this tutorial.

|-
||09.05
||Let's summarize.
|-
||09.07
||In this tutorial, we have learnt about

|-
||09.11
||Grammar of Turtle script and

|-
||09.14
|| ‘if-else’ condition
|-
||09.17
||Now to the assignment part.

|-
||09.19
||'''Solve an equation using'''

|-
||09.22
||if - else condition

|-
||09.24
|| Mathematical and comparision operators

|-
||09.27
|| Display the results using “print” and “go” commands.
|-
||09.33
||To solve the assignment

|-
||09.35
||Choose any four random numbers

|-
||09.38
|| Multiply two sets of random numbers

|-
||09.42
|| Compare the results using the comparison operators

|-
||09.46
|| Display both the results

|-
||09.49
|| Display greater result at the center of the canvas

|-
||09.54
|| You can choose any equation which you like.
|-
||09.59
||Watch the video available at this URL '''http://spoken-tutorial.org/What is a Spoken Tutorial'''

|-
||10.03
||It summarises the Spoken Tutorial project

|-
||10.06
||If you do not have good bandwidth, you can download and watch it

|-
|| 10.12
||The Spoken Tutorial Project Team :

|-
||10.14
||Conducts workshops using spoken tutorials

|-
||10.18
||Gives certificates to those who pass an online test

|-
||10.22
||For more details, please write to '''contact@spoken-tutorial.org'''
|-
|| 10.30
||Spoken Tutorial Project is a part of the Talk to a Teacher project

|-
||10.35
||It is supported by the National Mission on Education through ICT, MHRD, Government of India

|-
||1043
||More information on this Mission is available at this link '''http://spoken-tutorial.org/NMEICT-Intro ]'''

|-
||10.48
||The Script is contributed by '''ITfC Bangaluru.'''

|-
||10.52
||This is Madhuri Ganpathi from '''IIT Bombay''' signing off Thank you for joining.
|-

User:10.209.4.2 - Revision history

Sneha: Created page with '{|border =1 !Visual Cue !Narration |- ||00.01 ||Hello everybody. |- ||00.02 ||Welcome to this tutorial on '''Grammar of TurtleScript''' in '''KTurtle'''. |- ||00.08 ||In this …'