Difference between revisions of "KTurtle/C3/Programming-Concepts/English"

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Press CTRL+ALT+T simultaneously to open the terminal.
 
Press CTRL+ALT+T simultaneously to open the terminal.
 
Type KTurtle and press enter,  KTurtle Application opens.
 
Type KTurtle and press enter,  KTurtle Application opens.
 +
|-
 +
||
 +
||Let me type  and explain the program code.
 +
|-
 +
||
 +
||Let me zoom the program text, it may possibly be a little blurred.
 +
|-
 +
||#program to find square of a number
 +
Highlight #
 +
||#program to find square of a number. Press enter
 +
 +
# sign comments a line written after it.
 +
This means, this line will not be executed while running the program. Press enter.
 +
|-
 +
||reset
 +
Highlight reset
 +
||reset
 +
reset command sets Turtle to default position. Press enter.
 +
|-
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||$i= ask  "enter any number for i and click OK"     
 +
 +
Highlight $i
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||
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$i= ask  within double quotes  enter any number for i and click OK.       
 +
 +
$i is a variable to store user input.
 +
|-
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||Highlight ask
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||“ask”  command asks for user input to be stored in variable
 +
press enter
 +
|-
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||fontsize 28
 +
 +
Highlight fontsize 28
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||“fontsize” space 28  press enter.
 +
 +
fontsize 28  sets the font size used by print.
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Fontsize takes number as input, set in pixels.
 +
|-
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||print $i*$i 
 +
 +
Highlight print $i*$i
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||print $i*$i 
 +
 +
print $i*$i calculates and prints square of a number. 
 +
press enter.
 +
 +
|-
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||spritehide
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Highlight spritehide
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||spritehide
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spritehide hides Turtle from canvas.
 +
|-
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||Run the program code
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||Let us Run the program now.
 +
Click on Run button on the toolbar to start execution of the code in the editor.
 +
It shows a list of execution speeds.
 +
Full speed(no highlighting and inspector)
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Full speed,
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slow,
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slower,
 +
slowest and
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step-by-step.
 +
|-
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||Enter '15' for i
 +
Square of 15 =225
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||Let me run the code at slow speed.
 +
An input bar appears
 +
let's enter  15  for i  and click OK
 +
square of '15'  = '225' is displayed on the canvas.
 +
|-
 +
||Let's now learn to find nth power of a number through a  program.
 +
||I already have program  in a text editor.
 +
|-
 +
||#Program evaluates  nth power of a number
 +
reset
 +
$i= ask "enter number  for  i and click OK"
 +
$n=ask "enter number for n and click OK"
 +
fontsize 28
 +
print  ($i^$n)
 +
spritehide
 +
||Let me copy the code from editor and paste it into  KTurtle editor.
 +
 +
 +
Please pause the tutorial here and copy the program into your KTurtle editor.
 +
|-

Revision as of 16:41, 24 December 2012

Visual Cue Narration
Slide Number 1 Hello Everybody.

Welcome to this tutorial on Programming concepts in KTurtle.

Slide Number 2

Learning Objectives

In this tutorial, we will learn how to

  • Write a program in KTurtle
  • Use variables to store user input
  • Use print command to print on canvas
  • Comment a line
Slide Number 3

System Requirement


To record this tutorial, I am using,

Ubuntu Linux OS Version 11.10.

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.

Before proceeding, we will discuss some basic information about KTurtle.
Slide Number 5

Sprite

Turtle displayed on the canvas is called sprite.

Sprite is a small image that moves around the screen.

e.g. Cursor is a sprite.

Slide Number 6

sprite Commands

Spritehide command hides Turtle from canvas.

Spriteshow command shows Turtle if it is hidden.

Clear command cleans all drawings from canvas.

Slide Number 7

Symbols

In KTurtle,

$ sign is a container of variables.

  • (asterisk) is used for multiplication of two numbers.

^(caret) raises the power of a number.

  1. (hash) sign comments a line written after it.

sqrt is an inbuilt function to find square root of a number.

Switch to Kturtle Application

Dash home >>Media Apps>>Under Type >>Education>>KTurtle


Let's open new KTurtle Application

Click on Dash home >> Media Apps.

Under Type, Choose Education and KTurtle. KTurtle application opens.

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.

Let me type and explain the program code.
Let me zoom the program text, it may possibly be a little blurred.
#program to find square of a number

Highlight #

#program to find square of a number. Press enter
  1. sign comments a line written after it.

This means, this line will not be executed while running the program. Press enter.

reset

Highlight reset

reset

reset command sets Turtle to default position. Press enter.

$i= ask "enter any number for i and click OK"

Highlight $i

$i= ask within double quotes enter any number for i and click OK.

$i is a variable to store user input.

Highlight ask “ask” command asks for user input to be stored in variable

press enter

fontsize 28

Highlight fontsize 28

“fontsize” space 28 press enter.

fontsize 28 sets the font size used by print. Fontsize takes number as input, set in pixels.

print $i*$i

Highlight print $i*$i

print $i*$i

print $i*$i calculates and prints square of a number. press enter.

spritehide

Highlight spritehide

spritehide

spritehide hides Turtle from canvas.

Run the program code Let us Run the program now.

Click on Run button on the toolbar to start execution of the code in the editor. It shows a list of execution speeds. Full speed(no highlighting and inspector) Full speed, slow, slower, slowest and step-by-step.

Enter '15' for i

Square of 15 =225

Let me run the code at slow speed.

An input bar appears let's enter 15 for i and click OK square of '15' = '225' is displayed on the canvas.

Let's now learn to find nth power of a number through a program. I already have program in a text editor.
#Program evaluates nth power of a number

reset $i= ask "enter number for i and click OK" $n=ask "enter number for n and click OK" fontsize 28 print ($i^$n) spritehide

Let me copy the code from editor and paste it into KTurtle editor.


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

Contributors and Content Editors

Madhurig

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