KTurtle/C2/Grammar-of-TurtleScript/English - Revision history

Madhurig at 10:08, 18 December 2013

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Madhurig at 07:32, 25 March 2013

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Madhurig at 07:28, 25 March 2013

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Madhurig at 11:28, 18 March 2013

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Madhurig at 11:17, 18 March 2013

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Madhurig at 11:16, 18 March 2013

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Madhurig at 11:10, 18 March 2013

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Madhurig at 13:07, 15 March 2013

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Madhurig: Created page with ' {|border =1 !Visual Cue !Narration |- ||Slide Number 1 || Hello everybody. Welcome to this tutorial on Grammar of TurtleScript in KTurtle. |- ||Slide Number 2 Learning Objec…'

2013-03-15T11:18:31Z

Created page with ' {|border =1 !Visual Cue !Narration |- ||Slide Number 1 || Hello everybody. Welcome to this tutorial on Grammar of TurtleScript in KTurtle. |- ||Slide Number 2 Learning Objec…'

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{|border =1
!Visual Cue
!Narration
|-
||Slide Number 1
||

Hello everybody.

Welcome to this tutorial on Grammar of TurtleScript in KTurtle.
|-
||Slide Number 2
Learning Objectives
||In this tutorial, we will learn
Grammar of Turtle script and
'if'-'else' condition
|-
||Slide Number 3
System Requirement
||To record this tutorial I am using,
Ubuntu Linux OS version. 12.04.
KTurtle version. 0.8.1 beta.
|-
||Slide Number 4
Pre-requisites
||We assume that you have basic working knowledge of KTurtle
If not,
for relevant tutorials, please visit our website.
http://spoken-tutorial.org
|-
||Switch to KTurtle Application
Dash home >>In the Search bar type KTurtle Click on the KTurtle icon.
||Let's open a new KTurtle Application.

Click on Dash home.
In the Search bar, type KTurtle.
Click on the KTurtle icon.
|-
||Press CTRL+ALT+T >> open the terminal >>type kTurtle >>press enter to open
||We can also open KTurtle Application from the terminal.

Press CTRL+ALT+T simultaneously to open the terminal.

Type KTurtle and press enter KTurtle. Application opens
|-
||Turtle Script
||First I will explain about TurtleScript
TurtleScript is a programming language
It has different types of words and symbols used for various purposes
It instructs Turtle what to do
|-
||Grammar of TurtleScript
||Grammar of TurtleScript in KTurtle includes-
Comments
Commands
Numbers
Strings
Variables and
Boolean values
|-
||Numbers
||Now we will see where to store numbers
Numbers can be stored in
Mathematical operators
Comparison operators and
Variables
|-Zoom text
I will zoom the program text for clear view.
|-
||Switch to KTurtle window
||First let's look at variables.
Variables are words that start with a ‘$’, for example $a.
In the editor they are highlighted with purple.

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

Variable keeps the content until program finishes execution or until it is reassigned to something else.
You can use variables, once assigned, just as if they are their content.
|-
||
||For example, consider the code typed in the editor.

$a = 2004
$b = 25
|-
||
||print $a + $b

Variable 'a' is assigned a value 2004.

Variable 'b' is assigned a value 25

print command commands Turtle to write something on the canvas.

print command takes numbers and strings as input.

print $a + $b commands Turtle to add two values and display them on the canvas.
|-
||Run the code
||Let's Run the code slow speed.
Value 2029 is displayed on the canvas
|-
||Mathematical operators
||Let us next see the Mathematical Operators.
Mathematical operators include,
+ (Addition)
- (Subtraction)
* (Multiplcation)
/ (Division)
|-
||
||I already have a program in a text editor.
|-
||
reset
canvassize 200,200
$add = 1 + 1
$subtract = 20 – 5
$multiply = 15 * 2
$divide = 30 /30
go 10,10
print $add
go 50,50
print $subtract
go 100,100
print $multiply
go 175,175
print $divide
go 0,0
||I will copy the code from text editor and paste it into KTurtle editor.

Pause the tutorial and type the program into KTurtle editor.

Resume the tutorial after typing the program
|-
||
||I will Explain the code now
|-
||Highlight reset
||“reset” command sets Turtle to its default position
|-
||Highlight canvassize 200,200

||canvassize 200,200 fix the width and height of the canvas to 200 pixels each.
|-
||Highlight $add = 1 + 1
|| value 1+1 is assigned to the variable $add,
Highlight $subtract = 20 – 5
20-5 is assigned to variable $subtract,
Highlight $multiply = 15 * 2
value 15 * 2 will be assigned to the variable multiply.
Highlight $divide = 30 /30
30/30 is assigned to the variable Divide.
Highlight go 10,10
go 10,10 commands to turtle to go 10 pixels left of canvas and 10 pixels from top of canvas
Run code

Point to the values
Let us now run this code in slow speed
Command which is getting executed is highlighted in the editor.
Turtle displays the values on the canvas at the specified positions.

Let us consider a simple example for using the comparison operator .
Type the commands being shown on the screen.
zoom text
I will zoom the text to have clear view

Switch to Kturtle Window
$answer = 10 > 3
print $answer

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

The result of this comparison, the boolean value true is stored in the variable $answer and the value true is displayed.
Run the code
Let's run this code
Turtle has displayed Boolean value true on the canvas.
Strin Strings
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 quote as a string

I will clear the current code from editor.
Example of string
For example:I am typing the print command followed by a string, “Hello”.
We See that the string is highlighted in Red color.
Run code
When I run this piece of code, the turtle displays the string on the canvas.
Boolean Values
Next I will explain about Boolean values.
There are only two boolean values: true and false.

For example Let's type the code
`if-else' Condition
$answer = 7<5
print $answer

Boolean value false is displayed on the canvas.
Boolean value false is assigned to variable $answer because 7 is larger than 5

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

‘if’ condition is executed only if the
boolean value evaluates ‘true’
‘else’ condition is executed only if the ‘if’
condition is ‘false’ .

I already have a program in a text editor.
Reset
$x=4
if $x>5 {
print $x
print “is greater than five”
}
else {
print $x
print “is smaller than six”
}
go 0,0
I will copy the code from text editor and paste it into KTurtle editor.

Pause the tutorial and type the program into KTurtle editor.

Resume the tutorial after typing the program

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

Let me now run this code.
Turtle has compared the variables 4 and 5.
and displayed the result 4 is smaller than 6 on the canvas .

With this we come to the end of this tutorial.
Let's summarize.
Summary
In this tutorial, we have learnt about
Grammar of Turtle script and
‘if-else’ condition
Assignment
Now to the assignment part.
Solve an equation using
if - else condition
Mathematical and comparision operators
Display the results using “print” and “go” commands.

To solve the assignment
Choose any four random numbers
Multiply two sets of random numbers
ompare the results using the comparison operators
Display the results
Display greater result at center of the canvas
you can choose any equation which you like.
Slide number 11
Acknowledgement
Watch the video available at
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
Slide Number 12
The Spoken Tutorial Project Team :
Conducts workshops using spoken tutorials
Gives certificates to those who pass an online test
For more details, please write to
contact@spoken-tutorial.org
Slide number 13
Spoken Tutorial Project is a part of the Talk to a Teacher project
It is supported by the National Mission on Education through ICT, MHRD, Government of India
More information on this Mission is available at http://spoken-tutorial.org/NMEICT-Intro ]

Script is contributed by ITfC Bangaluru.
This is Madhuri Ganpathi from IIT Bombay signing off Thank you for joining.

← Older revision		Revision as of 10:08, 18 December 2013
Line 1:		Line 1:
		+	Title of the tutorial: Grammar-of-TurtleScript
		+
		+	Author: ITfC Bangaluru
		+
		+	Key words: Grammar of Turtle script, if-else condition, Comments, Commands, Numbers, Strings, Variables, Boolean values, strings and video tutorial.
		+
	{\|border =1		{\|border =1
	!Visual Cue		!Visual Cue

@@ Line 128: / Line 128: @@
 '''$a = 2004'''
- '''$b = 25'''
+'''$b = 25'''
 '''print $a + $b'''
@@ Line 195: / Line 195: @@
 |-
 ||Highlight '''print''' commands
-|| print command displays the varible on the canvas
+||'''print''' command displays the varible on the canvas
 |-
 ||
@@ Line 287: / Line 287: @@
 ||I will clear the current code from editor.type '''clear''' command and '''Run''' to clean the canvas
 |-
 ||Boolean Values
 ||Now  I will explain about Boolean values.
@@ Line 299: / Line 298: @@
 '''print $answer'''
 '''Boolean value false''' is assigned to variable''' $answer'''  because 7 is greater than 5
@@ Line 306: / Line 304: @@
 ||Let's Run the code now
-Turtle diplays Boolean value false on the canvas.
+'''Turtle''' diplays '''Boolean''' value '''false''' on the canvas.
 |-
 ||“if-else” conditon.
@@ Line 346: / Line 344: @@
 '''go 0,0'''
-|| 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.
 Pause the tutorial and type the program into '''KTurtle''' editor.

@@ Line 4: / Line 4: @@
 |-
 ||Slide Number 1
-Hello everybody.
+'''Title slide'''
 Welcome to this tutorial on '''Grammar of TurtleScript''' in '''KTurtle'''.

@@ Line 61: / Line 61: @@
 Type KTurtle  and press enter  KTurtle. Application opens
 |-
-||Turtle Script
+||Slide Number 5
 ||First I will explain about TurtleScript
@@ Line 70: / Line 72: @@
 * It '''instructs''' Turtle what to do
 |-
-||Grammar of TurtleScript
+||Slide Number 6
 ||Grammar of TurtleScript in KTurtle includes-
 * Comments
@@ Line 84: / Line 88: @@
 * Boolean values
 |-
-||Numbers
+||Slide Number 7
 ||Now we will see where to store numbers
@@ Line 141: / Line 147: @@
 Value '''2029''' is displayed on the canvas
 |-
-||Mathematical operators
+||Slide Number 8
 ||Let us next see the Mathematical  Operators.
@@ Line 250: / Line 258: @@
 '''Turtle''' has displayed '''Boolean value true''' on the canvas.
 |-
-||Strings
+||Slide Number 9
 ||Now lets see how Strings work in this application –
@@ Line 302: / Line 312: @@
 |-
 ||'''reset'''
 '''$x=4'''
 '''if $x>5 {'''
 '''print $x'''
 '''print “is greater than five”'''
 '''}'''
 '''else {'''
 '''print $x'''
 '''print “is smaller than six”'''
+}
 '''go 0,0'''
 || I will copy the code from text editor and paste it into '''KTurtle''' editor.
@@ Line 333: / Line 353: @@
 Let's summarize.
 |-
-Slide Number
+||Slide Number 10
 Summary
@@ Line 342: / Line 362: @@
 * ‘if-else’ condition
 |-
-||Assignment
+||Slide Number 11
 ||Now to the assignment part.
 Solve an equation using
@@ Line 352: / Line 375: @@
 * Display the results using  “print” and “go” commands.
 |-
-||Assignment
+||Slide Number 12
 ||
 To solve the assignment
 *Choose any four random numbers
 *Multiply two sets of random numbers
 *Compare the results using the comparison operators
 *Display the results
 *Display greater result at center of the canvas
 *You can choose any equation which you like.
 |-
-||Slide number 11
+||Slide number 13
 Acknowledgement
@@ Line 374: / Line 405: @@
 |-
-||Slide Number 12
+||Slide Number 14
 ||The Spoken Tutorial Project Team :
@@ Line 385: / Line 416: @@
 contact@spoken-tutorial.org
 |-
-||Slide number 13
+||Slide number 15
 ||Spoken Tutorial Project is a part of the Talk to a Teacher project