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

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

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

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

||If not, for relevant tutorials, please visit our website. '''http://spoken-tutorial.org'''

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

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

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

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

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

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

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

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

|| Comments

|| Commands

|| Numbers

|| Strings

|| Variables and

|| Boolean values

||Now we will see where to store numbers

|| Mathematical operators

||Comparison operators and

||Variables

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

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

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

||strings '''$a=hello''' or  

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

||Let us type,'''$a = 2004'''  

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

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

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

||Mathematical operators include,

* '''*''' (Multiplcation)  and

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

||I will Explain the code now

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

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

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

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

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

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

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

||Resume the tutorial after typing the program

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

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

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

||Let's type  

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

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

||Let's run the code now

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

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

||Strings can be put in variables like numbers  

||Strings cannot be used in mathematical or comparison operators  

||Strings are highlighted in red color  

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

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

||Now I will explain about Boolean values.

||For example  Let's type the code  

||'''print $answer'''  

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

||Let's Run the code now

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

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

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

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

||Resume the tutorial after typing the program

||Let's Run the code now

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

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

||In this tutorial, we have learnt about  

||Grammar of Turtle script  and

|| ‘if-else’ condition  

||Now to the assignment part.

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

||if - else condition

|| Mathematical  and comparision operators

||To solve the assignment

||Choose any four random numbers

|| Multiply two sets of random numbers

|| Compare the results using the comparison operators

|| Display both the results  

|| Display greater result at the  center of the canvas  

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

||It summarises the Spoken Tutorial project

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

||The Spoken Tutorial Project Team :  

||Conducts workshops using spoken tutorials

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

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

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

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