Difference between revisions of "KTurtle/C2/Grammar-of-TurtleScript-Part-I/English-timed"
From Script | Spoken-Tutorial
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“Introduction to KTurtle” tutorial on the spoken tutorial website. | “Introduction to KTurtle” tutorial on the spoken tutorial website. | ||
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| − | + | |00.12 | |
| − | | To get started with KTurtle, I am using the Linux operating system ubuntu | + | |To get started with KTurtle, I am using the Linux operating system ubuntu Version 11.04 and KTurtle version 0.8.1 beta. |
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| − | + | |- | |
| − | + | | 00.21 | |
| − | + | |This tutorial will help you understand further, the '''Grammar of | |
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TurtleScript'''. | TurtleScript'''. | ||
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| 00.26 | | 00.26 | ||
| − | | If you have already installed KTurtle, | + | |If you have already installed KTurtle, |
| − | + | |- | |
| 00.28 | | 00.28 | ||
| − | |go to the Ubuntu Menu Item '''Applications >''' '''Education''' and click | + | |go to the Ubuntu Menu Item '''Applications >''' '''Education''' and click on the '''KTurtle''' Application. |
| − | on the '''KTurtle''' Application. | + | |
| − | + | |- | |
| 00.34 | | 00.34 | ||
| − | |Another way to open KTurtle is by going to '''Applications > Accessories | + | |Another way to open KTurtle is by going to '''Applications > Accessories menu and click on Terminal''' |
| − | + | ||
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| 00.39 | | 00.39 | ||
| − | | At the prompt type the name of the application that is “'''kturtle'''” and | + | |At the prompt type the name of the application that is “'''kturtle'''” and hit 'Enter'. |
| − | hit 'Enter'. | + | |
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|00.51 | |00.51 | ||
| − | | In this tutorial, we will learn, the grammar of turtle script which | + | |In this tutorial, we will learn, the grammar of turtle script which |
includes, | includes, | ||
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| 00.55 | | 00.55 | ||
| − | | commands and comments | + | |commands and comments |
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| 00.56 | | 00.56 | ||
| − | | numbers, variables and strings | + | |numbers, variables and strings |
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| 01.05 | | 01.05 | ||
| − | | The '''TurtleScript '''is a programming language and has different types | + | | The '''TurtleScript '''is a programming language and has different types of words and symbols. |
| − | of words and symbols. | + | |
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| 01.15 | | 01.15 | ||
| − | |The grammar of TurtleScript can include '''comments and commands, numbers | + | |The grammar of TurtleScript can include '''comments and commands, numbers and strings .''' |
| − | + | ||
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| 01.33 | | 01.33 | ||
| − | |let us First have a look at variables, then we look at assigning values to | + | |let us First have a look at variables, then we look at assigning values to these variables. |
| − | + | ||
|- | |- | ||
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| 02.05 | | 02.05 | ||
| − | |It will keep that content until the program finishes the execution or until | + | |It will keep that content until the program finishes the execution or until the variable is reassigned to something else. |
| − | + | ||
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| 02.42 | | 02.42 | ||
| − | |The '''print''' command is used to command the turtle to print something on | + | |The '''print''' command is used to command the turtle to print something on the canvas. |
| − | + | ||
| − | + | |- | |
| − | | 02.47 | + | |02.47 |
|'''print '''takes numbers and strings as input. | |'''print '''takes numbers and strings as input. | ||
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| 02.51 | | 02.51 | ||
| − | |'''print $a + $b '''will add the two values and the turtle prints the value | + | |'''print $a + $b '''will add the two values and the turtle prints the value 2024. |
| − | + | ||
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|02.57 | |02.57 | ||
| − | |I am now running the command , you can see that turtle has printed the | + | |I am now running the command , you can see that turtle has printed the final result. |
| − | + | ||
|- | |- | ||
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| 03.23 | | 03.23 | ||
| − | |'''canvassize 200,200'''which resizes the canvas to 200 pixels of width and | + | |'''canvassize 200,200'''which resizes the canvas to 200 pixels of width and height each. |
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|- | |- | ||
| − | + | | 04.12 | |
|'''go 50,50''' | |'''go 50,50''' | ||
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| 04.49 | | 04.49 | ||
| − | | The canvas size 200,200 fix the width and height of the canvas to 200 | + | | The canvas size 200,200 fix the width and height of the canvas to 200 pixels each. |
| − | + | ||
|- | |- | ||
|04.55 | |04.55 | ||
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| 04.58 | | 04.58 | ||
| − | | The 20-5 is assigned to variable subtract, | + | |The 20-5 is assigned to variable subtract, |
|- | |- | ||
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| 05.06 | | 05.06 | ||
| − | | 30/30 is assigned to the variable ''Divide. | + | |30/30 is assigned to the variable ''Divide. |
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| 05.10 | | 05.10 | ||
| − | | We will not print the variables ,the result which is assigned to them and | + | | We will not print the variables ,the result which is assigned to them and the turtle moves in the canvas. |
| − | + | ||
|- | |- | ||
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| 05.34 | | 05.34 | ||
| − | | You can see that the values have been printed on the canvas now. | + | |You can see that the values have been printed on the canvas now. |
|- | |- | ||
| − | | 05.39 | + | |05.39 |
| Let us consider a simple example for using the comparison operator .Type the commands being shown on the screen | | Let us consider a simple example for using the comparison operator .Type the commands being shown on the screen | ||
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|- | |- | ||
| − | | 05.46 | + | |05.46 |
|'''$answer = 10 > 3''' | |'''$answer = 10 > 3''' | ||
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|- | |- | ||
| − | + | | 06.08 | |
| − | |The result of this comparison, the boolean value true will be stored in the | + | |The result of this comparison, the boolean value true will be stored in the variable '''$answer, '''and the value '''true '''is printed. |
| − | + | ||
|- | |- | ||
| 06.15 | | 06.15 | ||
| − | | Let me know Run this piece of code,you can see that the turtle has printed | + | | Let me know Run this piece of code,you can see that the turtle has printed the value true on the canvas. |
| − | + | ||
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| 06.24 | | 06.24 | ||
| − | | lets see how Strings work in this application – | + | |lets see how Strings work in this application – |
|- | |- | ||
| − | + | | 06.27 | |
|Strings can be put in variables, just like numbers. | |Strings can be put in variables, just like numbers. | ||
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| 06.31 | | 06.31 | ||
| − | |Strings cannot be used in mathematical operators or comparison operators | + | |Strings cannot be used in mathematical operators or comparison operators and Strings are highlighted with red. |
| − | + | ||
|- | |- | ||
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| 06.38 | | 06.38 | ||
| − | |Strings start and end with the '''''''' mark, by these marks KTurtle knows | + | |Strings start and end with the '''''''' mark, by these marks KTurtle knows that it is a string. |
| − | that it is a string. | + | |
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| 06.45 | | 06.45 | ||
| − | |For example:I am typing the print command followed by a string,See that | + | |For example:I am typing the print command followed by a string,See that the string is highlighted in Red color. |
| − | + | ||
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| 07.25 | | 07.25 | ||
| − | |The turtle choose the value true,the boolean value true is assigned the | + | |The turtle choose the value true,the boolean value true is assigned the variable ''$answer ''is set to ''true ''because 10 is larger than 3. |
| − | variable ''$answer ''is set to ''true ''because 10 is larger than 3. | + | |
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| 07.38 | | 07.38 | ||
| − | |the code that is placed between the brackets will be executed only ''if | + | |the code that is placed between the brackets will be executed only ''if ''the ''boolean value ''evaluates 'true'. |
| − | + | ||
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| 07.44 | | 07.44 | ||
| − | |The code between the brackets after ''else ''is only executed if the ''if | + | |The code between the brackets after ''else ''is only executed if the ''if''condition is false. |
| − | + | ||
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| 07.55 | | 07.55 | ||
| − | |'''$x = 4 '''I now have a sample piece of code on my editor here , which | + | |'''$x = 4 '''I now have a sample piece of code on my editor here , which compares the numbers 4 and 5 and prints the results accordingly. |
| − | + | ||
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| 08.03 | | 08.03 | ||
| − | |Let me now run this code. The turtle has compared the variables 4 and 5 and | + | |Let me now run this code. The turtle has compared the variables 4 and 5 and its printing the result 4 is smaller than 6 . |
| − | + | ||
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|Using the '''if '''and '''else '''conditions, the '''mathematical | |Using the '''if '''and '''else '''conditions, the '''mathematical | ||
| − | operators''', solve an equation and print the results using the '''print | + | operators''', solve an equation and print the results using the '''print'''and '''go '''command. |
| − | + | ||
|- | |- | ||
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| 08.28 | | 08.28 | ||
| − | |That is you can choose any four random numbers multiply the two sets of | + | |That is you can choose any four random numbers multiply the two sets of random numbers, compare the results using the comparison operators and print both the results and print that greater result at center of the canvas you can choose any equation which you like. |
| − | + | ||
| − | + | ||
| − | can choose any equation which you like. | + | |
|- | |- | ||
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|08.50 | |08.50 | ||
| − | |It is supported by the National Mission on Education through ICT, MHRD | + | |It is supported by the National Mission on Education through ICT, MHRD government of India. |
| − | + | ||
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| 08.56 | | 08.56 | ||
| − | | you can see more information about this on the link shown on the screen. | + | |you can see more information about this on the link shown on the screen. |
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|08.59 | |08.59 | ||
| − | | Thank you this is Sindhu signing off. Enjoy exploring KTurtle. | + | |Thank you this is Sindhu signing off. Enjoy exploring KTurtle. |
Revision as of 11:06, 10 January 2013
| Time | Narration
|
| 00.02 | Hello Everybody. Welcome to the KTurtle tutorial
|
| 00.05 | If this is the first time you are using KTurtle, please see the
“Introduction to KTurtle” tutorial on the spoken tutorial website. |
| 00.12 | To get started with KTurtle, I am using the Linux operating system ubuntu Version 11.04 and KTurtle version 0.8.1 beta.
|
| 00.21 | This tutorial will help you understand further, the Grammar of
TurtleScript.
|
| 00.26 | If you have already installed KTurtle,
|
| 00.28 | go to the Ubuntu Menu Item Applications > Education and click on the KTurtle Application.
|
| 00.34 | Another way to open KTurtle is by going to Applications > Accessories menu and click on Terminal
|
| 00.39 | At the prompt type the name of the application that is “kturtle” and hit 'Enter'.
|
| 00.46 | This will open the application.
|
| 00.51 | In this tutorial, we will learn, the grammar of turtle script which
includes,
|
| 00.55 | commands and comments
|
| 00.56 | numbers, variables and strings
|
| 00.58 | mathematical and comparison operators |
| 01.00 | and the boolean values
|
| 01.02 | And the if and else conditions
|
| 01.05 | The TurtleScript is a programming language and has different types of words and symbols.
|
| 01.10 | They are used for different purposes.
|
| 01.12 | And it instructs KTurtle to do something.
|
| 01.15 | The grammar of TurtleScript can include comments and commands, numbers and strings .
|
| 01.24 | Numbers can be stored in mathematical operators in comparison
operators.
|
| 01.28 | They can also be stored in variables.
|
| 01.33 | let us First have a look at variables, then we look at assigning values to these variables. |
| 01.38 | In the editor of a Kturtle script ,let us open example for
avariable.
|
| 01.43 | Variables are words that start with a symbol ‘$’, for example $a.
|
| 01.48 | In the editor they are highlighted with the purple color.
|
| 01.52 | Using the assignment, equal to a variable is given its content.
|
| 01.56 | Variables can contain any number, string or boolean values (true/false).
|
| 02.05 | It will keep that content until the program finishes the execution or until the variable is reassigned to something else.
|
| 02.11 | You can use variables, once assigned, just as if they are their content.
|
| 02.16 | For example, consider the code being typed in the editor now.
|
| 02.20 | '$a = 2004 '$b = 25
|
| 02.27 | Andprint $a + $b
|
| 02.33 | First the value 2004 is assigned to the variable $a . |
| 02.37 | The next the value 2005,25'is assigned to variable '$b .
|
| 02.42 | The print command is used to command the turtle to print something on the canvas.
|
| 02.47 | print takes numbers and strings as input.
|
| 02.51 | print $a + $b will add the two values and the turtle prints the value 2024.
|
| 02.57 | I am now running the command , you can see that turtle has printed the final result. |
| 03.05 | Let us next see the Mathematical and the Comparison Operators.
|
| 03.08 | The basic mathematical operators here are +, - , * , /
|
| 03.16 | In the editor of a Kturtle let us type the following example –
|
| 03.20 | reset
|
| 03.23 | canvassize 200,200which resizes the canvas to 200 pixels of width and height each.
|
| 03.32 | $add = 1 + 1
|
| 03.40 | $subtract = 20 - 5
|
| 03.52 | $multiply = 15 * 2
|
| 03.59 | $divide = 30 /30
|
| 04.05 | go 10,10
|
| 04.09 | print $add |
| 04.12 | go 50,50
|
| 04.15 | print $subtract
|
| 04.20 | go 100,100
|
| 04.25 | print $divide
|
| 04.30 | go 0,0
|
| 04.34 | Andprint $multiply
|
| 04.41 | go 175,175
|
| 04.49 | The canvas size 200,200 fix the width and height of the canvas to 200 pixels each. |
| 04.55 | The value 1+1 is assigned to the variable $+, |
| 04.58 | The 20-5 is assigned to variable subtract, |
| 05.02 | The value 15 * 2 will be assigned to the variable multiply. |
| 05.06 | 30/30 is assigned to the variable Divide.
|
| 05.10 | We will not print the variables ,the result which is assigned to them and the turtle moves in the canvas. |
| 05.16 | Let us now run this code.The command which is getting executed is
highlighted in the editor and the turtle is printing the results.
|
| 05.34 | You can see that the values have been printed on the canvas now.
|
| 05.39 | Let us consider a simple example for using the comparison operator .Type the commands being shown on the screen
|
| 05.46 | $answer = 10 > 3 |
| 05.51 | Andprint $answer |
| 06.02 | Here 10 is compared with 3 the ’greater than’ operator.
|
| 06.08 | The result of this comparison, the boolean value true will be stored in the variable $answer, and the value true is printed. |
| 06.15 | Let me know Run this piece of code,you can see that the turtle has printed the value true on the canvas.
|
| 06.24 | lets see how Strings work in this application –
|
| 06.27 | Strings can be put in variables, just like numbers.
|
| 06.31 | Strings cannot be used in mathematical operators or comparison operators and Strings are highlighted with red. |
| 06.38 | Strings start and end with the ''' mark, by these marks KTurtle knows that it is a string.
|
| 06.45 | For example:I am typing the print command followed by a string,See that the string is highlighted in Red color.
|
| 06.56 | When I run this piece of code, the turtle prints the chain on the canvas. |
| 07.03 | Boolean Values
|
| 07.04 | There are only two boolean values: true and false.
|
| 07.07 | For example –I am typing the example for using the boolean value in
kturtle.
|
| 07.14 | $answer = 10 > 3
|
| 07.20 | print $answer |
| 07.25 | The turtle choose the value true,the boolean value true is assigned the variable $answer is set to true because 10 is larger than 3.
|
| 07.36 | Executing 'if' and 'else'conditions.
|
| 07.38 | the code that is placed between the brackets will be executed only if the boolean value evaluates 'true'.
|
| 07.44 | The code between the brackets after else is only executed if the ifcondition is false.
|
| 07.50 | For example –
|
| 07.53 | reset
|
| 07.55 | $x = 4 I now have a sample piece of code on my editor here , which compares the numbers 4 and 5 and prints the results accordingly.
|
| 08.03 | Let me now run this code. The turtle has compared the variables 4 and 5 and its printing the result 4 is smaller than 6 .
|
| 08.18 | Now to the Assignment part.
|
| 08.20 | Using the if and else conditions, the mathematical
operators, solve an equation and print the results using the printand go command. |
| 08.28 | That is you can choose any four random numbers multiply the two sets of random numbers, compare the results using the comparison operators and print both the results and print that greater result at center of the canvas you can choose any equation which you like. |
| 08.45 | I would like to acknowledge the spoken tutorial project |
| 08.48 | which is part of the talk to a teacher project.
|
| 08.50 | It is supported by the National Mission on Education through ICT, MHRD government of India.
|
| 08.56 | you can see more information about this on the link shown on the screen.
|
| 08.59 | Thank you this is Sindhu signing off. Enjoy exploring KTurtle.
|
-- Thanks and regards Madhuri Ganpathi
