Difference between revisions of "KTurtle/C2/Grammar-of-TurtleScript/English-timed"

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||Hello everybody.

||Hello everybody.

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||Welcome to this tutorial on '''Grammar of TurtleScript''' in '''KTurtle'''.  

||Welcome to this tutorial on '''Grammar of TurtleScript''' in '''KTurtle'''.  

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||In this tutorial, we will learn about

||In this tutorial, we will learn about

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

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

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||To record this tutorial I am using,  Ubuntu Linux OS version. 12.04.  KTurtle version. 0.8.1 beta.  

||To record this tutorial I am using,  Ubuntu Linux OS version. 12.04.  KTurtle version. 0.8.1 beta.  

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||We assume that you have basic working knowledge of KTurtle  

||We assume that you have basic working knowledge of KTurtle  

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||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'''  

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||Let's open a new '''KTurtle''' Application.  

||Let's open a new '''KTurtle''' Application.  

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||Click on '''Dash home'''.   

||Click on '''Dash home'''.   

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

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

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||Click on the '''KTurtle''' icon.  

||Click on the '''KTurtle''' icon.  

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||We  can also open  KTurtle  using '''Terminal.'''

||We  can also open  KTurtle  using '''Terminal.'''

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

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

   

   

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||Type '''KTurtle'''  and press enter  to open the '''KTurtle''' Application.

||Type '''KTurtle'''  and press enter  to open the '''KTurtle''' Application.

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||Let's first look at '''TurtleScript'''

||Let's first look at '''TurtleScript'''

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|| '''TurtleScript''' is a programming language  

|| '''TurtleScript''' is a programming language  

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

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

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|| It '''instructs''' Turtle what to do

|| It '''instructs''' Turtle what to do

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||'''Grammar of TurtleScript''' in ''' KTurtle''' includes-  

||'''Grammar of TurtleScript''' in ''' KTurtle''' includes-  

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|| Comments

|| Comments

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|| Commands

|| Commands

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|| Numbers

|| Numbers

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|| Strings

|| Strings

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|| Variables and

|| Variables and

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|| Boolean values

|| Boolean values

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||Now we will see where to store numbers

||Now we will see where to store numbers

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||'''Numbers'''  can be stored in

||'''Numbers'''  can be stored in

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|| Mathematical operators

|| Mathematical operators

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||Comparison operators and

||Comparison operators and

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||Variables

||Variables

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||I will zoom the program text for clear view.

||I will zoom the program text for clear view.

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||First  let's look at variables.  

||First  let's look at variables.  

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

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

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||Variables are highlighted in '''purple''' color.  

||Variables are highlighted in '''purple''' color.  

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

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

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

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

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||strings '''$a=hello''' or  

||strings '''$a=hello''' or  

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

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

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

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

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||For example, consider the code.

||For example, consider the code.

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||Let us type,'''$a = 2004'''  

||Let us type,'''$a = 2004'''  

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||'''$b = 25'''  

||'''$b = 25'''  

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||'''print $a + $b'''  

||'''print $a + $b'''  

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||Variable 'a' is assigned a  value ''' 2004.'''

||Variable 'a' is assigned a  value ''' 2004.'''

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

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

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

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

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

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

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||'''print $a + $b'''  commands '''Turtle''' to add two values and display them on the canvas.

||'''print $a + $b'''  commands '''Turtle''' to add two values and display them on the canvas.

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||Let's Run the code in '''slow''' speed.

||Let's Run the code in '''slow''' speed.

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||Value '''2029''' is displayed on the canvas

||Value '''2029''' is displayed on the canvas

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||Mathematical operators include,

||Mathematical operators include,

* '''/''' (Division)

* '''/''' (Division)

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|| I will clear the current code from editor and type '''clear''' command and '''RUN''' to clean the canvas

|| I will clear the current code from editor and type '''clear''' command and '''RUN''' to clean the canvas

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||I already have a program in a text editor.  

||I already have a program in a text editor.  

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||I will Explain the code now

||I will Explain the code now

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||'''“reset”''' command sets Turtle to its '''default''' position

||'''“reset”''' command sets Turtle to its '''default''' position

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||'''canvassize 200,200''' fixes the width and height of the canvas to 200 pixels each.  

||'''canvassize 200,200''' fixes the width and height of the canvas to 200 pixels each.  

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|| value '''1+1''' is assigned to the variable''' $add,'''  

|| value '''1+1''' is assigned to the variable''' $add,'''  

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||Value '''20-5''' is assigned to variable '''$subtract''',  

||Value '''20-5''' is assigned to variable '''$subtract''',  

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||value '''15 * 2''' is be assigned to the variable '''$multiply.'''  

||value '''15 * 2''' is be assigned to the variable '''$multiply.'''  

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||'''30/30''' is assigned to the variable '''$divide.'''  

||'''30/30''' is assigned to the variable '''$divide.'''  

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||'''go 10,10''' commands to '''Turtle''' to go 10 pixels left of canvas and 10 pixels from top of canvas

||'''go 10,10''' commands to '''Turtle''' to go 10 pixels left of canvas and 10 pixels from top of canvas

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||'''print''' command displays the varible on the canvas

||'''print''' command displays the varible on the canvas

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||I will copy the code from text editor and paste it into '''KTurtle''' editor.

||I will copy the code from text editor and paste it into '''KTurtle''' editor.

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

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

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||Resume the tutorial after typing the program

||Resume the tutorial after typing the program

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||Let us click on '''Run''' button  to run the program

||Let us click on '''Run''' button  to run the program

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

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

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||'''Turtle''' displays the values on the canvas at the specified positions.  

||'''Turtle''' displays the values on the canvas at the specified positions.  

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||Let us consider a simple example for using  '''comparison operator''' .

||Let us consider a simple example for using  '''comparison operator''' .

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|| I will clear the current code from editor and type '''clear''' command and '''RUN''' to clean the canvas

|| I will clear the current code from editor and type '''clear''' command and '''RUN''' to clean the canvas

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||I will  zoom the progrm text to have clear view

||I will  zoom the progrm text to have clear view

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||Let's type  

||Let's type  

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

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

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||'''print $answer'''

||'''print $answer'''

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

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

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

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

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||variable '''$answer''' and the value '''true''' is displayed on the canvas.

||variable '''$answer''' and the value '''true''' is displayed on the canvas.

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||Let's run the code now

||Let's run the code now

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||'''Turtle''' displays '''Boolean value true''' on the canvas.

||'''Turtle''' displays '''Boolean value true''' on the canvas.

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||Now lets see how Strings work in this application –

||Now lets see how Strings work in this application –

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||Strings can be put in variables like numbers  

||Strings can be put in variables like numbers  

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||Strings cannot be used in mathematical or comparison operators  

||Strings cannot be used in mathematical or comparison operators  

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||Strings are highlighted in red color  

||Strings are highlighted in red color  

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||KTurtle identifies a line in double quotes as a string

||KTurtle identifies a line in double quotes as a string

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||I will clear the current code from editor.type '''clear''' command and '''Run''' to clean the canvas

||I will clear the current code from editor.type '''clear''' command and '''Run''' to clean the canvas

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||Now  I will explain about Boolean values.

||Now  I will explain about Boolean values.

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||There are only two '''boolean''' values: '''true''' and '''false.'''  

||There are only two '''boolean''' values: '''true''' and '''false.'''  

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||For example  Let's type the code  

||For example  Let's type the code  

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

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

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||'''print $answer'''  

||'''print $answer'''  

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||'''Boolean value false''' is assigned to variable''' $answer'''  because 7 is greater than 5

||'''Boolean value false''' is assigned to variable''' $answer'''  because 7 is greater than 5

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||Let's Run the code now

||Let's Run the code now

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||'''Turtle''' diplays '''Boolean''' value '''false''' on the canvas.

||'''Turtle''' diplays '''Boolean''' value '''false''' on the canvas.

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||Let's next learn about “if-else” conditon.

||Let's next learn about “if-else” conditon.

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

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

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||‘else’ condition is executed only if the ‘if’ condition is ‘false’ .

||‘else’ condition is executed only if the ‘if’ condition is ‘false’ .

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||I will clear the current code from editor.type '''clear''' command and '''Run''' to clean the canvas

||I will clear the current code from editor.type '''clear''' command and '''Run''' to clean the canvas

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||I already have a code in a text file.

||I already have a code in a text file.

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||This code compares  numbers 4 , 5 and 6 and  displays the results accordingly on the canvas.

||This code compares  numbers 4 , 5 and 6 and  displays the results accordingly on the canvas.

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||I will copy the code from text editor and paste it into '''KTurtle''' editor.

||I will copy the code from text editor and paste it into '''KTurtle''' editor.

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

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

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||Resume the tutorial after typing the program

||Resume the tutorial after typing the program

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||Let's Run the code now

||Let's Run the code now

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

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

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||and has displayed the  result 4 is smaller than 6 on the canvas .  

||and has displayed the  result 4 is smaller than 6 on the canvas .  

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||With this we come to the end of this tutorial.

||With this we come to the end of this tutorial.

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||Let's summarize.

||Let's summarize.

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||In this tutorial, we have learnt about  

||In this tutorial, we have learnt about  

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||Grammar of Turtle script  and

||Grammar of Turtle script  and

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|| ‘if-else’ condition  

|| ‘if-else’ condition  

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||Now to the assignment part.

||Now to the assignment part.

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||'''Solve an equation using'''

||'''Solve an equation using'''

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||if - else condition

||if - else condition

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|| Mathematical  and comparision  operators

|| Mathematical  and comparision  operators

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|| Display the results using  “print” and “go” commands.  

|| Display the results using  “print” and “go” commands.  

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||To solve the assignment

||To solve the assignment

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||Choose any four random numbers

||Choose any four random numbers

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|| Multiply two sets of random numbers

|| Multiply two sets of random numbers

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|| Compare the results using the comparison operators

|| Compare the results using the comparison operators

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|| Display both the results  

|| Display both the results  

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|| Display greater result at the  center of the canvas  

|| Display greater result at the  center of the canvas  

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|| You can choose any equation which you like.  

|| You can choose any equation which you like.  

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||Watch the video available at this URL '''http://spoken-tutorial.org/What is a Spoken Tutorial'''

||Watch the video available at this URL '''http://spoken-tutorial.org/What is a Spoken Tutorial'''

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||It summarises the Spoken Tutorial project

||It summarises the Spoken Tutorial project

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

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

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||The Spoken Tutorial Project Team :  

||The Spoken Tutorial Project Team :  

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||Conducts workshops using spoken tutorials

||Conducts workshops using spoken tutorials

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||Gives certificates to those who pass an online test  

||Gives certificates to those who pass an online test  

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||For more details, please write to  '''contact@spoken-tutorial.org'''  

||For more details, please write to  '''contact@spoken-tutorial.org'''  

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||Spoken Tutorial Project is a part of the Talk to a Teacher project  

||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 link '''http://spoken-tutorial.org/NMEICT-Intro ]'''  

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

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

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

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

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

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