Difference between revisions of "KTurtle/C3/Control-Execution/English"

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Line 6: Line 6:
 
||
 
||
  
−
Hello everybody.
 
  
 
Hello Everybody.
 
Hello Everybody.
Line 17: Line 16:
 
||In this tutorial, we will learn  
 
||In this tutorial, we will learn  
 
''''while'''' loop  and
 
''''while'''' loop  and
 +
 
''''for'''' loop
 
''''for'''' loop
 
|-
 
|-
Line 24: Line 24:
 
||In this tutorial, we will learn  
 
||In this tutorial, we will learn  
 
* 'while' loop  and
 
* 'while' loop  and
 +
 
* 'for' loop
 
* 'for' loop
 
|-
 
|-
Line 38: Line 39:
  
 
'''Pre-requisites'''
 
'''Pre-requisites'''
−
||We assume that you have basic working knowledge of Kturtle.  
+
||We assume that you have basic working knowledge of '''Kturtle'''.  
  
 
If not,  
 
If not,  
Line 45: Line 46:
 
http://spoken-tutorial.org
 
http://spoken-tutorial.org
 
|-
 
|-
−
||Switch to KTurtle Application
+
||Switch to''' KTurtle''' Application
−
Dash  home >>Search bar appears>>
+
 
−
In the Search bar type KTurtle
+
'''Dash  home''' >>'''Search bar appears'''>>
−
||Let's open a new KTurtle Application.
+
 
−
Click on  Dash  home. The Search bar appears.
+
In the Search bar type '''KTurtle'''
 +
||Let's open a new '''KTurtle''' Application.
 +
 
 +
Click on  '''Dash  home'''. The '''Search bar appears'''.
 +
 
 
In the Search bar, type KTurtle.
 
In the Search bar, type KTurtle.
 +
 
Click on the option.
 
Click on the option.
 
KTurtle Application opens.
 
KTurtle Application opens.
Line 68: Line 74:
 
Loop
 
Loop
 
||Loop is a block of code is executed repeatedly untill a certain condition is satisfied.
 
||Loop is a block of code is executed repeatedly untill a certain condition is satisfied.
−
Eg. “while” loop and  “for” loop
+
Eg. '''“while”''' loop and  '''“for”''' loop
 
|-
 
|-
 
||
 
||
−
||Let's begin the tutorial with “while” loop
+
||Let's begin the tutorial with '''“while”''' loop
 
|-
 
|-
 
||Slide Number 7
 
||Slide Number 7
 +
 
“while”  loop
 
“while”  loop
−
||In  the “while” loop, the code inside the loop repeats till boolean evaluates to 'false'.
+
||In  the '''“while'''” loop, the code inside the loop repeats till '''boolean''' evaluates to 'false'.
 
|-
 
|-
 
||Slide Number 8
 
||Slide Number 8
  
 
Syntax of  “while” loop
 
Syntax of  “while” loop
−
||Let me explain the structure of “while” loop.
+
||Let me explain the structure of '''“while”''' loop.
−
while loop condition {  
+
'''while loop condition {  
 
   do something  
 
   do something  
 
   with  loop increment variable
 
   with  loop increment variable
−
}
+
}'''
 
|-
 
|-
 
||
 
||
Line 91: Line 98:
 
I already have the code in a text editor.
 
I already have the code in a text editor.
 
|-
 
|-
−
||#program to print a series of multiples 3 upto 30
+
||'''#program to print a series of multiples 3 upto 30'''
−
reset  
+
'''reset'''
−
$x=0  
+
'''$x=0'''
−
message"In while loop, code inside the loop repeats till boolean evaluates false"
+
'''message"In while loop, code inside the loop repeats till boolean evaluates false"'''
−
while $x<30 {  
+
'''while $x<30''' {  
−
$x=$x+3
+
'''$x=$x+3'''
−
fontsize 15
+
'''fontsize 15'''
−
forward 20
+
'''forward 20'''
−
print $x  
+
'''print $x'''
 
}  
 
}  
 
||
 
||
−
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
  
  
−
Please pause the tutorial here and type the program into your KTurtle editor.
+
Please pause the tutorial here and type the program into your '''KTurtle''' editor.
 
Please resume the turtorial after typing the program
 
Please resume the turtorial after typing the program
 
|-
 
|-
Line 118: Line 125:
 
It means, this line will not be executed while running the program.
 
It means, this line will not be executed while running the program.
 
|-
 
|-
−
||Highlight reset
+
||Highlight '''reset'''
−
||reset command sets “Turtle” to its default position.
+
||'''reset''' command sets '''“Turtle'''” to its '''default''' position.
 
|-
 
|-
 
||Highlight $x
 
||Highlight $x
−
||$x=0 initialises the value of variable x to zero.
+
||'''$x=0''' initialises the value of variable x to zero.
 
|-
 
|-
−
||Highlight message" "
+
||Highlight '''message" "'''
 
||Message in a program is given within double quotes after the keyword  message " "   
 
||Message in a program is given within double quotes after the keyword  message " "   
−
“message” command takes “string” as input.  
+
'''“message”''' command takes “string” as input.  
 
It shows a pop-up dialog box containing text from the string.  
 
It shows a pop-up dialog box containing text from the string.  
 
|-
 
|-
−
||Highlight while $x<30
+
||Highlight '''while $x<30'''
−
||while $x<30 checks the “while” condition.  
+
||'''while $x<30''' checks the '''“while”''' condition.  
 
|-
 
|-
−
||Highlight $x=$x+3
+
||Highlight '''$x=$x+3'''
−
||$x=$x+3  increments the value of  variable $x by 3
+
||'''$x=$x+3''' increments the value of  variable $x by 3
 
|-
 
|-
−
||Highlight fontsize 15
+
||Highlight '''fontsize 15'''
−
||fontsize 15 sets the font size used by print command.  
+
||'''fontsize 15 ''' sets the font size used by '''print''' command.  
 
Fontsize takes number as input, set in pixels.
 
Fontsize takes number as input, set in pixels.
 
|-
 
|-
−
||Highlight forward 20  
+
||Highlight '''forward 20'''
−
||forward 20 commands “Turtle” to move 20 steps forward on the canvas.
+
||'''forward 20''' commands '''“Turtle”''' to move 20 steps forward on the canvas.
 
|-
 
|-
−
||Highlight print $x  
+
||Highlight '''print $x'''
−
||print $x displays the value of variable x on the canvas.
+
||'''print $x''' displays the value of variable x on the canvas.
 
|-
 
|-
−
||Run the program
+
||'''Run the program'''
−
||Let me click on the “Run” button to run the program.
+
||Let me click on the '''“Run”''' button to run the program.
  
 
A message dialog box pops up.
 
A message dialog box pops up.
Line 153: Line 160:
 
||Run the program
 
||Run the program
 
||Multiples of 3 from 3 to 30 are displayed on the canvas.  
 
||Multiples of 3 from 3 to 30 are displayed on the canvas.  
−
“Turtle” moves 20 steps forward on the canvas.  
+
'''“Turtle”''' moves 20 steps forward on the canvas.  
 
|-
 
|-
 
||
 
||
 
||
 
||
−
Let's next work with “for” loop
+
Let's next work with '''“for”''' loop
 
|-
 
|-
 
||Slide Number  9
 
||Slide Number  9
 
"for" loop
 
"for" loop
 
||“for” loop is a counting loop.
 
||“for” loop is a counting loop.
−
          Every time  the code inside “for” loop is executed,
+
 
 +
Every time  the code inside “for” loop is executed,
 +
 
 
variable value is incremented, till it reaches  the end value.
 
variable value is incremented, till it reaches  the end value.
 
|-
 
|-
 
||Slide Number 10
 
||Slide Number 10
 +
 
Syntax of “for” loop
 
Syntax of “for” loop
 
||Let me explain the structure of “for” loop.
 
||Let me explain the structure of “for” loop.
−
for variable = start number to end number  { Statement}
+
 
 +
'''for variable = start number to end number  { Statement}'''
 
|-
 
|-
 
||Clear the editor and canvas
 
||Clear the editor and canvas
 
||Let me clear the current program.
 
||Let me clear the current program.
 +
 
Let me type clear command and run to clean the canvas.
 
Let me type clear command and run to clean the canvas.
 
|-
 
|-
−
||#program print to sum of first 15 natural numbers
+
||'''#program print to sum of first 15 natural numbers
−
reset
+
''reset'''
−
$r=0
+
'''$r=0'''
−
for $x= 1 to 15{
+
'''for $x= 1 to 15'''{
−
$r=$x*($x+1)/2
+
'''$r=$x*($x+1)/2'''
−
fontsize 18
+
'''fontsize 18'''
−
print $r
+
'''print $r'''
−
forward 15
+
'''forward 15'''
 
}
 
}
−
go 10,250
+
'''go 10,250''
−
wait 2
+
'''wait 2'''
−
print "Sum of first 15 natural numbers ="+$r
+
'''print "Sum of first 15 natural numbers ="+$r'''
 
||Let me copy the program and paste it into KTurtle editor
 
||Let me copy the program and paste it into KTurtle editor
  
  
 
Please pause the tutorial here and type the program into your KTurtle editor.
 
Please pause the tutorial here and type the program into your KTurtle editor.
 +
 
Please resume the turtorial after typing the program.
 
Please resume the turtorial after typing the program.
 
|-
 
|-
 
||
 
||
−
||
+
||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.
+
 
|-
 
|-
 
||
 
||
Line 202: Line 214:
 
||# sign comments a line written after it.
 
||# sign comments a line written after it.
 
|-
 
|-
−
||Highlight reset
+
||Highlight '''reset'''
−
||reset command sets “Turtle” to default position.
+
||'''reset''' command sets '''“Turtle”''' to '''default''' position.
 
|-
 
|-
−
||Highlight $r=0
+
||Highlight '''$r=0'''
−
||$r=0 initialises the value of variable r to zero.
+
||'''$r=0''' initialises the value of variable r to zero.
 
|-
 
|-
−
||Highlight for $x= 1 to 15
+
||Highlight '''for $x= 1 to 15'''
−
||for $x= 1 to 15 checks “for” condition  from 1 to 15.
+
||'''for $x= 1 to 15''' checks '''“for”''' condition  from 1 to 15.
 
|-
 
|-
−
||Highlight $r=$x*($x+1)/2
+
||Highlight '''$r=$x*($x+1)/2'''
−
||$r=$x*($x+1)/2 calculates the value of variable r.
+
||'''$r=$x*($x+1)/2''' calculates the value of variable r.
 
|-
 
|-
−
||Highlight fontsize 18
+
||Highlight '''fontsize 18'''
−
||fontsize 18 sets the font size used by print command.  
+
||'''fontsize 18''' sets the font size used by '''print''' command.  
 
|-
 
|-
−
||Highlight print $r
+
||Highlight '''print $r'''
−
||print $r displays the variable r.
+
||'''print $r''' displays the variable r.
 
|-
 
|-
 
||Highlight forward 15
 
||Highlight forward 15
 
||forward 15  moves Turtle 15 steps foward.
 
||forward 15  moves Turtle 15 steps foward.
 
|-
 
|-
−
||Highlight go 10,250
+
||Highlight '''go 10,250'''
−
||go 10,250  commands  Turtle to go 10 pixels from left of canvas and 250 pixels from top of canvas.
+
||'''go 10,250''' commands  '''Turtle''' to go 10 pixels from left of canvas and 250 pixels from top of canvas.
 
|-
 
|-
−
||Highlight wait 2
+
||Highlight '''wait 2'''
−
||“Turtle” displays all print commands without any time gap.
+
||'''“Turtle”''' displays all print commands without any time gap.
−
“Wait 2” command makes Turtle to “wait” for 2 seconds before executing next command.
+
“Wait 2” command makes Turtle to '''“wait”''' for 2 seconds before executing next command.
 
|-
 
|-
−
||print "Sum of first 15 natural numbers ="+$r
+
||'''print "Sum of first 15 natural numbers ="+$r'''
−
||“print” command displays the “string” within double quotes and also displays variable $r.
+
||'''“print”''' command displays the “string” within double quotes and also displays variable $r.
 
|-
 
|-
−
||Run the program
+
||'''Run the program'''
−
||Let me click the “ Run” button to run the program.
+
||Let me click the '''“ Run”''' button to run the program.
 
A series of sum of first 15 numbers and  sum of first 15 natural numbers is displayed on the canvas.
 
A series of sum of first 15 numbers and  sum of first 15 natural numbers is displayed on the canvas.
−
Turtle moves 15 steps forward.
+
'''Turtle''' moves 15 steps forward.
 
|-
 
|-
 
||
 
||
Line 243: Line 255:
 
Slide Number 11
 
Slide Number 11
  
−
Summary
+
'''Summary'''
 
||Let us summarize.
 
||Let us summarize.
 
In this tutorial we have learnt to use,  
 
In this tutorial we have learnt to use,  
−
* “while” loop and
+
* '''“while”''' loop and
−
* “for” loop
+
 
 +
*''' “for” ''' loop
 
|-
 
|-
 
||Slide Number 12
 
||Slide Number 12
−
Assignment
+
'''Assignment'''
 
||As an assignment I would like you to write programs to evaluate
 
||As an assignment I would like you to write programs to evaluate
  
 
* Multiples of 2 using “while” loop
 
* Multiples of 2 using “while” loop
 +
 
* Multiplication table of a number using “for”  loop
 
* Multiplication table of a number using “for”  loop
 
|-
 
|-
 
||Slide number 11
 
||Slide number 11
−
||Acknowledgement
+
||'''Acknowledgement'''
−
 
+
 
Watch the video available at  this URL
 
Watch the video available at  this URL
 +
 
http://spoken-tutorial.org/What is a Spoken Tutorial  
 
http://spoken-tutorial.org/What is a Spoken Tutorial  
 +
 
It summarises the Spoken Tutorial project  
 
It summarises the Spoken Tutorial project  
−
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  
 
|-
 
|-
 
||Slide Number 13
 
||Slide Number 13
Line 270: Line 285:
  
 
Conducts workshops using spoken tutorials  
 
Conducts workshops using spoken tutorials  
 +
 
Gives certificates to those who pass an online test  
 
Gives certificates to those who pass an online test  
 +
 
For more details, please write to
 
For more details, please write to
 +
 
contact@spoken-tutorial.org
 
contact@spoken-tutorial.org
 
|-
 
|-
Line 278: Line 296:
  
 
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  
 +
 
More information on this Mission is available at this link
 
More information on this Mission is available at this link
 
http://spoken-tutorial.org/NMEICT-Intro ]
 
http://spoken-tutorial.org/NMEICT-Intro ]

Revision as of 17:38, 26 December 2012

Slide Number 11 Summary
Visual Cue Narration
Slide Number 1


Hello Everybody.

Welcome to this tutorial on Control Execution in KTurtle

Slide Number 2

Learning Objectives

In this tutorial, we will learn

'while' loop and

'for' loop

Slide Number 2

Learning Objectives

In this tutorial, we will learn
  • 'while' loop and
  • 'for' loop
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 >>Search bar appears>>

In the Search bar type KTurtle

Let's open a new KTurtle Application.

Click on Dash home. The Search bar appears.

In the Search bar, type KTurtle.

Click on the option. KTurtle Application opens.

Let me first explain about what is control execution.
Slide Number 5

Control execution

Control execution is controlling the flow of a program.

Different conditions are used to control program execution.

Slide Number 6

Loop

Loop is a block of code is executed repeatedly untill a certain condition is satisfied.

Eg. “while” loop and “for” loop

Let's begin the tutorial with “while” loop
Slide Number 7

“while” loop

In the “while” loop, the code inside the loop repeats till boolean evaluates to 'false'.
Slide Number 8

Syntax of “while” loop

Let me explain the structure of “while” loop.

while loop condition { 

 do something 
 with  loop increment variable

}

I already have the code in a text editor.

#program to print a series of multiples 3 upto 30

reset $x=0 message"In while loop, code inside the loop repeats till boolean evaluates false" while $x<30 { $x=$x+3 fontsize 15 forward 20 print $x }

Let me copy the program from text editor and paste it into KTurtle editor


Please pause the tutorial here and type the program into your KTurtle editor. Please resume the turtorial after typing the program

Let me zoom into the program text it may possibly be a little blurred.
Let me explain the code.
Highlight # # sign comments a line written after it.

It means, this line will not be executed while running the program.

Highlight reset reset command sets “Turtle” to its default position.
Highlight $x $x=0 initialises the value of variable x to zero.
Highlight message" " Message in a program is given within double quotes after the keyword message " "

“message” command takes “string” as input. It shows a pop-up dialog box containing text from the string.

Highlight while $x<30 while $x<30 checks the “while” condition.
Highlight $x=$x+3 $x=$x+3 increments the value of variable $x by 3
Highlight fontsize 15 fontsize 15 sets the font size used by print command.

Fontsize takes number as input, set in pixels.

Highlight forward 20 forward 20 commands “Turtle” to move 20 steps forward on the canvas.
Highlight print $x print $x displays the value of variable x on the canvas.
Run the program Let me click on the “Run” button to run the program.

A message dialog box pops up. Let me click OK.

Run the program Multiples of 3 from 3 to 30 are displayed on the canvas.

“Turtle” moves 20 steps forward on the canvas.

Let's next work with “for” loop

Slide Number 9

"for" loop

“for” loop is a counting loop.

Every time the code inside “for” loop is executed,

variable value is incremented, till it reaches the end value.

Slide Number 10

Syntax of “for” loop

Let me explain the structure of “for” loop.

for variable = start number to end number { Statement}

Clear the editor and canvas Let me clear the current program.

Let me type clear command and run to clean the canvas.

#program print to sum of first 15 natural numbers

reset' $r=0 for $x= 1 to 15{ $r=$x*($x+1)/2 fontsize 18 print $r forward 15 } 'go 10,250 wait 2 print "Sum of first 15 natural numbers ="+$r

Let me copy the program and paste it into KTurtle editor


Please pause the tutorial here and type the program into your KTurtle editor.

Please resume the turtorial after typing the program.

Let me zoom into the program text it may possibly be a little blurred.
Let me explain the code.
Highlight # # sign comments a line written after it.
Highlight reset reset command sets “Turtle” to default position.
Highlight $r=0 $r=0 initialises the value of variable r to zero.
Highlight for $x= 1 to 15 for $x= 1 to 15 checks “for” condition from 1 to 15.
Highlight $r=$x*($x+1)/2 $r=$x*($x+1)/2 calculates the value of variable r.
Highlight fontsize 18 fontsize 18 sets the font size used by print command.
Highlight print $r print $r displays the variable r.
Highlight forward 15 forward 15 moves Turtle 15 steps foward.
Highlight go 10,250 go 10,250 commands Turtle to go 10 pixels from left of canvas and 250 pixels from top of canvas.
Highlight wait 2 “Turtle” displays all print commands without any time gap.

“Wait 2” command makes Turtle to “wait” for 2 seconds before executing next command.

print "Sum of first 15 natural numbers ="+$r “print” command displays the “string” within double quotes and also displays variable $r.
Run the program Let me click the “ Run” button to run the program.

A series of sum of first 15 numbers and sum of first 15 natural numbers is displayed on the canvas. Turtle moves 15 steps forward.

With this we come to end of this tutorial.
Let us summarize.

In this tutorial we have learnt to use,

  • “while” loop and
  • “for” loop
Slide Number 12

Assignment

As an assignment I would like you to write programs to evaluate
  • Multiples of 2 using “while” loop
  • Multiplication table of a number using “for” loop
Slide number 11 Acknowledgement

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

Slide Number 13 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 this link http://spoken-tutorial.org/NMEICT-Intro ]

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

Contributors and Content Editors

Madhurig

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