Difference between revisions of "Ruby/C2/Hello-Ruby/English-timed"

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|Welcome to the Spoken Tutorial on  '''Hello''' '''Ruby'''!  

|Welcome to the Spoken Tutorial on  '''Hello''' '''Ruby'''!  

|-

|-

|  In this tutorial we will learn  

|  In this tutorial we will learn  

|-

|-

| What is '''Ruby'''?

| What is '''Ruby'''?

|-

|-

|  Features

|  Features

|-  

|-  

|  '''RubyGems''' &  ''' Help on Ruby'''

|  '''RubyGems''' &  ''' Help on Ruby'''

|-

|-

|  Installation

|  Installation

|-

|-

|  Running '''Ruby''' code

|  Running '''Ruby''' code

|-

|-

|  Commenting

|  Commenting

|-

|-

|  Difference between '''puts''' and '''print'''  

|  Difference between '''puts''' and '''print'''  

|-

|-

|  Here we are using  '''Ubuntu Linux '''version 12.04  '''Ruby''' 1.9.3

|  Here we are using  '''Ubuntu Linux '''version 12.04  '''Ruby''' 1.9.3

|-

|-

|  To follow this tutorial you must be connected to  internet.  

|  To follow this tutorial you must be connected to  internet.  

|-

|-

| You must have knowledge of using '''Terminal '''and '''Text editor '''in '''Linux'''.  

| You must have knowledge of using '''Terminal '''and '''Text editor '''in '''Linux'''.  

|-

|-

|  Now I will explain what is '''Ruby'''.

|  Now I will explain what is '''Ruby'''.

|-

|-

|  '''Ruby''' is an object-oriented, interpreted scripting language.  

|  '''Ruby''' is an object-oriented, interpreted scripting language.  

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|-

|  It is dynamic, open source programming language.   

|  It is dynamic, open source programming language.   

|-

|-

|  It has an elegant syntax that is natural to read and easy to write.  

|  It has an elegant syntax that is natural to read and easy to write.  

|-

|-

|  Now let us see some features of '''Ruby'''.

|  Now let us see some features of '''Ruby'''.

|-

|-

|  '''Ruby''' is highly portable.  

|  '''Ruby''' is highly portable.  

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|-

| '''Ruby''' program runs in any operating system.

| '''Ruby''' program runs in any operating system.

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|-

|  Variables in '''Ruby''' have no datatype, such as in '''Smalltalk, BASIC''' or '''Python'''.

|  Variables in '''Ruby''' have no datatype, such as in '''Smalltalk, BASIC''' or '''Python'''.

|-

|-

|  It supports automatic memory management.

|  It supports automatic memory management.

|-

|-

|  '''Ruby''' is free format language.

|  '''Ruby''' is free format language.

|-

|-

|  You can start writing your program from any line and column.

|  You can start writing your program from any line and column.

|-

|-

|  '''Ruby''' is used for developing Internet and Intra-net applications.

|  '''Ruby''' is used for developing Internet and Intra-net applications.

|-

|-

| One of the most important feature of '''Ruby''' is '''RubyGems'''.

| One of the most important feature of '''Ruby''' is '''RubyGems'''.

|-

|-

| '''RubyGems''' is a package manager for  '''Ruby''' programming language.

| '''RubyGems''' is a package manager for  '''Ruby''' programming language.

|-

|-

| It provides a standard format for distributing''' Ruby''' programs and libraries.

| It provides a standard format for distributing''' Ruby''' programs and libraries.

|-

|-

| You can create and publish your own '''gems. '''

| You can create and publish your own '''gems. '''

|-

|-

| For more information on '''RubyGems''' visit the following link.

| For more information on '''RubyGems''' visit the following link.

|-

|-

|  To get more help on '''Ruby''' you can visit the links shown.

|  To get more help on '''Ruby''' you can visit the links shown.

|-

|-

| You can install '''Ruby '''using the '''Ubuntu Software Centre'''.

| You can install '''Ruby '''using the '''Ubuntu Software Centre'''.

|-

|-

| For more information on '''Ubuntu Software Centre''', please refer to the Ubuntu Linux Tutorials on this website.

| For more information on '''Ubuntu Software Centre''', please refer to the Ubuntu Linux Tutorials on this website.

|-

|-

|  Other methods for installing '''Ruby '''are as shown in this slide.

|  Other methods for installing '''Ruby '''are as shown in this slide.

|-

|-

| 'Ruby code '''can be executed in 3 ways

| 'Ruby code '''can be executed in 3 ways

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|-

|  '''Command line '''

|  '''Command line '''

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|-

|  '''Interactive Ruby'''

|  '''Interactive Ruby'''

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|-

|  As a '''file''  

|  As a '''file''  

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|-

| We will go through each method of execution.

| We will go through each method of execution.

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|-

|  First let us see how to execute the  '''Hello World''' code from  command line.

|  First let us see how to execute the  '''Hello World''' code from  command line.

|-

|-

| Open a terminal by pressing the '''Ctrl, Alt and T '''keys simultaneously.  

| Open a terminal by pressing the '''Ctrl, Alt and T '''keys simultaneously.  

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|-

| A terminal window appears on your screen.

| A terminal window appears on your screen.

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|-

|  Type the command

|  Type the command

|-

|-

| '''ruby '''''space''''' ''hyphen ''e '''''space'' within single quotes '''puts '''space''' '''then within double quotes''' Hello World''' and

| '''ruby '''''space''''' ''hyphen ''e '''''space'' within single quotes '''puts '''space''' '''then within double quotes''' Hello World''' and

|-

|-

| Press '''Enter.'''

| Press '''Enter.'''

|-

|-

|  We get the output as '''Hello World.'''

|  We get the output as '''Hello World.'''

|-

|-

|  '''puts '''command''' '''is used to print the output on the '''terminal.'''

|  '''puts '''command''' '''is used to print the output on the '''terminal.'''

|-

|-

|  The'' hyphen'' '''e flag '''allows only a single line of code to be executed.

|  The'' hyphen'' '''e flag '''allows only a single line of code to be executed.

|-

|-

| Multiple''' '''''hyphen''''' e flags''' can be used to execute multiple line commands.  

| Multiple''' '''''hyphen''''' e flags''' can be used to execute multiple line commands.  

|-

|-

| Lets try this out

| Lets try this out

|-

|-

|  Now press the up Arrow key to get the previous command and  

|  Now press the up Arrow key to get the previous command and  

|-

|-

|  Type ''space''' hyphen ''e '''''space ''within'' ''single quotes '''puts '''space '''1+2 '''and

|  Type ''space''' hyphen ''e '''''space ''within'' ''single quotes '''puts '''space '''1+2 '''and

|-

|-

| Press''' Enter.'''

| Press''' Enter.'''

|-

|-

|  We get the output as '''Hello World '''and''' 3.'''

|  We get the output as '''Hello World '''and''' 3.'''

|-

|-

| Let's switch back to our slide

| Let's switch back to our slide

|-

|-

|We will now learn about '''Interactive Ruby.'''

|We will now learn about '''Interactive Ruby.'''

|-

|-

| '''Interactive Ruby '''allows the execution of '''Ruby''' commands with immediate response.

| '''Interactive Ruby '''allows the execution of '''Ruby''' commands with immediate response.

|-

|-

| You can run '''Ruby''' statements and examine the output and return values.

| You can run '''Ruby''' statements and examine the output and return values.

|-

|-

| For older version of '''Ruby,''' install '''irb''' separately.

| For older version of '''Ruby,''' install '''irb''' separately.

|-

|-

| Now let us execute our '''Ruby''' code through '''irb.''' Go to the terminal  

| Now let us execute our '''Ruby''' code through '''irb.''' Go to the terminal  

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|-

| Type'''irb '''and Press '''Enter'''  

| Type'''irb '''and Press '''Enter'''  

|-

|-

| to launch the '''Interactive Ruby'''  

| to launch the '''Interactive Ruby'''  

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|-

| Type '''puts ''' space within double quotes '''Hello World''' and press '''Enter.'''

| Type '''puts ''' space within double quotes '''Hello World''' and press '''Enter.'''

|-

|-

|We get the output as '''Hello World.'''

|We get the output as '''Hello World.'''

|-

|-

|  And We get the return value as '''nil.'''

|  And We get the return value as '''nil.'''

|-

|-

|  To''' '''exit from '''irb '''type '''exit''' and press '''Enter.'''

|  To''' '''exit from '''irb '''type '''exit''' and press '''Enter.'''

|-

|-

|  You can also run '''Ruby program''' from a file.

|  You can also run '''Ruby program''' from a file.

|-

|-

| You can use any text editor of your choice to write the code.

| You can use any text editor of your choice to write the code.

|-

|-

|  I am using '''gedit '''text editor'''. Let me switch to  '''gedit''' text editor

|  I am using '''gedit '''text editor'''. Let me switch to  '''gedit''' text editor

|-

|-

|  Now, type '''puts''' space within double quotes''' Hello World '''

|  Now, type '''puts''' space within double quotes''' Hello World '''

|-

|-

| Lets learn how to add multiple line or block '''comments'''.

| Lets learn how to add multiple line or block '''comments'''.

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|-

|  Before the '''puts '''command

|  Before the '''puts '''command

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|-

| Type, ''equal to '''''begin '''and press '''Enter'''

| Type, ''equal to '''''begin '''and press '''Enter'''

|-

|-

| 'Equal to '''''begin '''is used to start the comment.

| 'Equal to '''''begin '''is used to start the comment.

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|-

|  Type the comments that you wish to add.

|  Type the comments that you wish to add.

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|-

| I will type '''My first Ruby program '''

| I will type '''My first Ruby program '''

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|-

| and Press '''Enter'''

| and Press '''Enter'''

|-

|-

| Then type '''This code will print helloworld''' and '''Press Enter'''

| Then type '''This code will print helloworld''' and '''Press Enter'''

|-

|-

|  Now type ''equal to '''''end'''

|  Now type ''equal to '''''end'''

|-

|-

| ''equal to '''''end '''is used to end the multiple line''' comments.'''

| ''equal to '''''end '''is used to end the multiple line''' comments.'''

|-

|-

|  '''Comments''' are useful to understand the flow of program.

|  '''Comments''' are useful to understand the flow of program.

|-

|-

| It is useful for documentation.

| It is useful for documentation.

|-

|-

| Now, let us '''save''' the '''file''' by clicking on the '''Save '''button.  

| Now, let us '''save''' the '''file''' by clicking on the '''Save '''button.  

|-

|-

| It is a good practice to '''save''' the file frequently.

| It is a good practice to '''save''' the file frequently.

|-

|-

|  The '''Save As '''dialog box''' '''appears on your screen.  

|  The '''Save As '''dialog box''' '''appears on your screen.  

|-

|-

| Browse the location where you want to save the file.  

| Browse the location where you want to save the file.  

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|-

|  On 'Desktop, '''I will create a folder named '''rubyprogram'''.  

|  On 'Desktop, '''I will create a folder named '''rubyprogram'''.  

|-

|-

| We will save the file inside this folder.  

| We will save the file inside this folder.  

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|-

|  In the '''Name''' text-box, type the name that you wish to add.  

|  In the '''Name''' text-box, type the name that you wish to add.  

|-

|-

| I will type '''hello.rb'''

| I will type '''hello.rb'''

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|-

|  '''Dot rb''' extension is given to a '''Ruby '''file

|  '''Dot rb''' extension is given to a '''Ruby '''file

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|  Then click on '''Save '''button to save the file.  So the file is saved now.  

|  Then click on '''Save '''button to save the file.  So the file is saved now.  

|-

|-

|  To execute the code, go to the '''terminal.'''

|  To execute the code, go to the '''terminal.'''

|-

|-

| Lets clear the terminal first.

| Lets clear the terminal first.

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|-

|  Make sure that you are in the directory where your '''Ruby '''file is present.

|  Make sure that you are in the directory where your '''Ruby '''file is present.

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|-

|  Remember that we are in the '''home '''directory. We need to go to the subdirectory '''rubyprogram'''.

|  Remember that we are in the '''home '''directory. We need to go to the subdirectory '''rubyprogram'''.

|-

|-

| To do so, type '''cd''' space '''Desktop/rubyprogram''' and press '''Enter.'''  

| To do so, type '''cd''' space '''Desktop/rubyprogram''' and press '''Enter.'''  

|-

|-

|  Let's execute the file . Type '''ruby space hello dot rb''' and press '''Enter'''

|  Let's execute the file . Type '''ruby space hello dot rb''' and press '''Enter'''

|-

|-

| We get the output '''HelloWorld.'''

| We get the output '''HelloWorld.'''

|-

|-

|  Now let me demonstrate the difference between '''puts''' and '''print '''statement.

|  Now let me demonstrate the difference between '''puts''' and '''print '''statement.

|-

|-

| We will try this out using''' irb'''

| We will try this out using''' irb'''

|-

|-

|  Before that we need to go back to the home directory.To do so type '''cd '''and press '''Enter'''

|  Before that we need to go back to the home directory.To do so type '''cd '''and press '''Enter'''

|-

|-

|Now type '''irb''' and Press Enter''' to launch the '''Interactive Ruby.'''

|Now type '''irb''' and Press Enter''' to launch the '''Interactive Ruby.'''

|-

|-

|  Type '''puts '''space within double quotes '''Hello '''comma within double quotes '''World '''

|  Type '''puts '''space within double quotes '''Hello '''comma within double quotes '''World '''

|-

|-

| Here''' comma '''is used to join the two '''puts''' command together.

| Here''' comma '''is used to join the two '''puts''' command together.

|-

|-

| Now press '''Enter.'''

| Now press '''Enter.'''

|-

|-

|  We get the output '''Hello World,''' but on separate lines.

|  We get the output '''Hello World,''' but on separate lines.

|-

|-

|  Now let's try the same thing with '''print.'''

|  Now let's try the same thing with '''print.'''

|-

|-

| Press up arrow key to get the previous command

| Press up arrow key to get the previous command

|-

|-

| Replace puts with print and  Press '''Enter.'''

| Replace puts with print and  Press '''Enter.'''

|-

|-

|  We get the output as '''Hello World '''but on the same line.

|  We get the output as '''Hello World '''but on the same line.

|-

|-

|  The keyword '''puts''' adds a newline to the end of the output. The keyword''' print '''does not.

|  The keyword '''puts''' adds a newline to the end of the output. The keyword''' print '''does not.

|-

|-

|  The keyword''' print '''outputs only what we have provided.

|  The keyword''' print '''outputs only what we have provided.

|-

|-

|    This brings us to the end of this Spoken Tutorial. Let us switch back to our slides.

|    This brings us to the end of this Spoken Tutorial. Let us switch back to our slides.

|-

|-

|  In this tutorial we have learnt

|  In this tutorial we have learnt

|-

|-

|  About '''Ruby'''

|  About '''Ruby'''

|-

|-

|  Installation

|  Installation

|-

|-

|  Execution of '''Ruby '''code  

|  Execution of '''Ruby '''code  

|-

|-

| Adding multiple comments using  =begin and  =end

| Adding multiple comments using  =begin and  =end

|-

|-

| Difference between '''puts''' and '''print'''

| Difference between '''puts''' and '''print'''

|-

|-

| As an assignment

| As an assignment

|-

|-

| Write a program to print your name and age  

| Write a program to print your name and age  

|-

|-

| We used '''multiple line comments''' in this tutorial  

| We used '''multiple line comments''' in this tutorial  

|-

|-

| Try to give '''single line comment'''  

| Try to give '''single line comment'''  

   

   

|-

|-

| Watch the video available at the following link.

| Watch the video available at the following link.

|-

|-

| 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.  

|-

|-

|  The Spoken Tutorial Project Team :

|  The Spoken Tutorial Project Team :

|-

|-

| 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 contact@spoken-tutorial.org

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

|-

|-

|  Spoken Tutorial Project is a part of Talk to a Teacher project.

|  Spoken Tutorial Project is a part of Talk to a Teacher project.

|-

|-

| 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 below link

| More information on this Mission is available at below link

|-

|-

| This is Afrin Pinjari from IIT Bombay, signing off.

| This is Afrin Pinjari from IIT Bombay, signing off.

|-

|-

| Thank you for watching.

| Thank you for watching.

|}

|}