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

From Script | Spoken-Tutorial
Jump to: navigation, search
 
(3 intermediate revisions by one other user not shown)
Line 13: Line 13:
 
|-
 
|-
 
|  00:06
 
|  00:06
−
| * What is '''Ruby'''?
+
| What is '''Ruby'''?
  
 
|-
 
|-
 
|  00:08
 
|  00:08
−
| * Features
+
| Features, '''RubyGems''' &  Help on Ruby
−
 
+
−
|-
+
−
|  00:09
+
−
| * '''RubyGems''' &  Help on Ruby
+
  
 
|-
 
|-
 
| 00:12  
 
| 00:12  
−
|  Installation
+
|  Installation, Running '''Ruby''' code
−
 
+
−
|-
+
−
|  00:13
+
−
|  Running '''Ruby''' code
+
  
 
|-
 
|-
 
|  00:15
 
|  00:15
−
|  Commenting
+
|  Commenting,  Difference between '''puts''' and '''print'''.  
−
 
+
−
|-
+
−
|  00:16
+
−
|  Difference between '''puts''' and '''print'''.  
+
  
 
|-
 
|-
 
|  00:19
 
|  00:19
−
| Here we are using:
+
| Here, we are using: '''Ubuntu Linux '''version '''12.04''',  '''Ruby''' 1.9.3
−
* '''Ubuntu Linux '''version '''12.04'''  
+
−
* '''Ruby''' 1.9.3
+
  
 
|-
 
|-
 
|  00:27
 
|  00:27
−
|  To follow this tutorial, you must be connected to internet.  
+
|  To follow this tutorial, you must be connected to internet.  
  
 
|-
 
|-
 
|  00:30
 
|  00:30
−
| You must have knowledge of using '''Terminal '''and '''Text editor '''in '''Linux'''.  
+
| You must have the knowledge of using '''Terminal '''and '''Text editor '''in '''Linux'''.  
  
 
|-
 
|-
 
|  00:37
 
|  00:37
−
|  Now I will explain what is '''Ruby'''.
+
|  Now, I will explain you what is '''Ruby'''.
  
 
|-
 
|-
Line 91: Line 77:
 
|-
 
|-
 
|  01:14
 
|  01:14
−
|  '''Ruby''' is free format language.
+
|  '''Ruby''' is a free format language.
  
 
|-
 
|-
Line 127: Line 113:
 
|-
 
|-
 
|  01:55
 
|  01:55
−
| You can install Ruby using the '''Ubuntu Software Centre'''.
+
| You can install Ruby using '''Ubuntu Software Centre'''.
  
 
|-
 
|-
Line 143: Line 129:
 
|-
 
|-
 
|  02:16
 
|  02:16
−
|* '''Command line '''
+
| '''Command line ''', '''Interactive Ruby''' and
−
 
+
−
|-
+
−
|  02:17
+
−
|* '''Interactive Ruby'''
+
  
 
|-
 
|-
 
|  02:19
 
|  02:19
−
|* As a '''file'''.  
+
| As a '''file'''.  We will go through each method of execution.
−
 
+
−
|-
+
−
| 02:20
+
−
| We will go through each method of execution.
+
  
 
|-
 
|-
Line 167: Line 145:
 
|-
 
|-
 
|  02:33
 
|  02:33
−
| A terminal window appears on your screen.
+
| A '''terminal window''' appears on your screen.
  
 
|-
 
|-
 
| 02:37
 
| 02:37
−
|  Type the command:
+
|  Type the command: '''ruby''' ''space''  ''hyphen'' '''e''' ''space'' within single quotes '''puts''' ''space'' then within double quotes '''Hello World''' and
−
 
+
−
|-
+
−
|  02:38
+
−
| '''ruby''' ''space''  ''hyphen'' '''e''' ''space'' within single quotes '''puts''' ''space'' then within double quotes '''Hello World''' and
+
  
 
|-
 
|-
Line 183: Line 157:
 
|-
 
|-
 
|  02:53
 
|  02:53
−
|   We get the output as '''HelloWorld.'''
+
| We get the output as "HelloWorld".
  
 
|-
 
|-
Line 191: Line 165:
 
|-
 
|-
 
| 03:00
 
| 03:00
−
|  The hyphen 'e' '''flag''' allows only a single line of code to be executed.
+
|  The hyphen 'e' '''flag''' allows only a single line of a code to be executed.
  
 
|-
 
|-
Line 215: Line 189:
 
|-
 
|-
 
|  03:32
 
|  03:32
−
|  We get the output as '''Hello World '''and''' 3.'''
+
|  We get the output as "Hello World" and''' 3.'''
  
 
|-
 
|-
Line 223: Line 197:
 
|-
 
|-
 
|  03:38
 
|  03:38
−
|We will now learn about '''Interactive Ruby.'''
+
| We will now learn about '''Interactive Ruby.'''
  
 
|-
 
|-
Line 231: Line 205:
 
|-
 
|-
 
|  03:48
 
|  03:48
−
| You can run Ruby statements and examine the output and return values.
+
| You can run Ruby statements and examine the output and the return values.
  
 
|-
 
|-
 
|  03:53
 
|  03:53
−
| For older version of Ruby, install '''irb''' separately.
+
| For older version of Ruby, install the '''irb''' separately.
  
 
|-
 
|-
 
|  03:57
 
|  03:57
−
| 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'''.  
  
 
|-
 
|-
Line 259: Line 233:
 
|-
 
|-
 
|  04:22
 
|  04:22
−
|   and we get the return value as '''nil.'''
+
| and we get the return value as '''nil.'''
  
 
|-
 
|-
Line 267: Line 241:
 
|-
 
|-
 
| 04:31
 
| 04:31
−
|  You can also run '''Ruby program''' from a file.
+
|  You can also run the '''Ruby program''' from a file.
  
 
|-
 
|-
Line 319: Line 293:
 
|-
 
|-
 
| 05:32
 
| 05:32
−
| ''equal to'' '''end '''is used to end the '''multiple line comment'''s.
+
| ''equal to'' '''end '''is used to end the '''multiple line comments'''.
  
 
|-
 
|-
Line 367: Line 341:
 
|-
 
|-
 
|  06:21
 
|  06:21
−
|  Then click on '''Save '''button to save the file.  So, the file is saved now.  
+
|  Then click on the '''Save '''button to save the file.  So, the file is saved now.  
  
 
|-
 
|-
Line 383: Line 357:
 
|-
 
|-
 
|  06:39  
 
|  06:39  
−
|   Remember that we are in the '''home '''directory. We need to go to the sub-directory '''rubyprogram'''.
+
| Remember that we are in the '''home '''directory. We need to go to the sub-directory '''rubyprogram'''.
  
 
|-
 
|-
Line 395: Line 369:
 
|-
 
|-
 
| 07:10
 
| 07:10
−
| We get the output: "HelloWorld".
+
| We get the output as "HelloWorld".
  
 
|-
 
|-
 
|  07:13
 
|  07:13
−
|  Now, let me demonstrate the difference between '''puts''' and '''print '''statement.
+
|  Now, let me demonstrate the difference between '''puts''' and '''print '''statements.
  
 
|-
 
|-
 
|  07:18
 
|  07:18
−
| We will try this out using''' irb'''.
+
| We will try this out using "irb".
  
 
|-
 
|-
 
|  07:22
 
|  07:22
−
|  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 our '''home''' directory. To do so, type "cd" and press '''Enter'''.
  
 
|-
 
|-
 
|  07:31
 
|  07:31
−
|Now, type '''irb''' and press '''Enter''' to launch the '''Interactive Ruby.'''
+
|Now, type "irb" and press '''Enter''' to launch the '''Interactive Ruby.'''
  
 
|-
 
|-
Line 427: Line 401:
 
|-
 
|-
 
|  07:57
 
|  07:57
−
|  We get the output '''Hello World,''' but on separate lines.
+
|  We get the output '''Hello,  World,''' but on the separate lines.
  
 
|-
 
|-
Line 455: Line 429:
 
|-
 
|-
 
|  08:31
 
|  08:31
−
| 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 slide.
  
 
|-
 
|-
Line 463: Line 437:
 
|-
 
|-
 
|  08:39
 
|  08:39
−
|* About '''Ruby'''
+
| About '''Ruby''', Installation
−
 
+
−
|-
+
−
| 08:41
+
−
|* Installation
+
  
 
|-
 
|-
 
|  08:42
 
|  08:42
−
|* Execution of '''Ruby '''code  
+
| Execution of '''Ruby '''code  
  
 
|-
 
|-
 
|  08:44
 
|  08:44
−
|* Adding multiple comments using  =begin and  =end
+
| Adding multiple comments using  =begin and  =end
  
 
|-
 
|-
 
|  08:50
 
|  08:50
−
|* Difference between '''puts''' and '''print'''.
+
| Difference between '''puts''' and '''print'''.
  
 
|-
 
|-
Line 515: Line 485:
 
|-
 
|-
 
|  09:17
 
|  09:17
−
|* Conducts workshops using spoken tutorials.  
+
| Conducts workshops using spoken tutorials.  
  
 
|-
 
|-
 
|  09:20
 
|  09:20
−
|* Gives certificates to those who pass an online test.  
+
| Gives certificates to those who pass an online test.  
  
 
|-
 
|-
Line 527: Line 497:
 
|-
 
|-
 
|  09:30
 
|  09:30
−
|  '''Spoken Tutorial''' project is a part of '''Talk to a Teacher''' project.
+
|  '''Spoken Tutorial''' project is a part of the '''Talk to a Teacher''' project.
  
 
|-
 
|-
Line 535: Line 505:
 
|-
 
|-
 
|  09:41
 
|  09:41
−
| More information on this mission is available at below link.
+
| More information on this mission is available at the below link.
  
 
|-
 
|-

Latest revision as of 11:57, 10 March 2017

Time Narration
00:00 Welcome to the Spoken Tutorial on Hello Ruby!.
00:04 In this tutorial, we will learn
00:06 What is Ruby?
00:08 Features, RubyGems & Help on Ruby
00:12 Installation, Running Ruby code
00:15 Commenting, Difference between puts and print.
00:19 Here, we are using: Ubuntu Linux version 12.04, Ruby 1.9.3
00:27 To follow this tutorial, you must be connected to internet.
00:30 You must have the knowledge of using Terminal and Text editor in Linux.
00:37 Now, I will explain you what is Ruby.
00:40 Ruby is an object-oriented, interpreted scripting language.
00:44 It is dynamic, open source programming language.
00:48 It has an elegant syntax that is natural to read and easy to write.
00:54 Now, let us see some features of Ruby.
00:57 Ruby is highly portable.
00:59 Ruby program runs in any operating system.
01:04 Variables in Ruby have no datatype such as in Smalltalk, BASIC or Python.
01:11 It supports automatic memory management.
01:14 Ruby is a free format language.
01:17 You can start writing your program from any line and column.
01:21 Ruby is used for developing Internet and Intra-net applications.
01:26 One of the most important features of Ruby is RubyGems.
01:31 RubyGems is a package manager for Ruby programming language.
01:36 It provides a standard format for distributing Ruby programs and libraries.
01:42 You can create and publish your own gems.
01:46 For more information on RubyGems, visit the following link.
01:51 To get more help on Ruby, you can visit the links shown.
01:55 You can install Ruby using Ubuntu Software Centre.
01:59 For more information on Ubuntu Software Centre, please refer to the Ubuntu Linux Tutorials on this website.
02:07 Other methods for installing Ruby are as shown in this slide.
02:12 Ruby code can be executed in 3 ways-
02:16 Command line , Interactive Ruby and
02:19 As a file. We will go through each method of execution.
02:23 First, let us see how to execute the Hello World code from command line.
02:28 Open a terminal by pressing the Ctrl, Alt and T keys simultaneously.
02:33 A terminal window appears on your screen.
02:37 Type the command: ruby space hyphen e space within single quotes puts space then within double quotes Hello World and
02:50 press Enter.
02:53 We get the output as "HelloWorld".
02:56 puts command is used to print the output on the terminal.
03:00 The hyphen 'e' flag allows only a single line of a code to be executed.
03:06 Multiple hyphen 'e' flags can be used to execute multiple line commands.
03:11 Let's try this out.
03:13 Now, press the up-arrow key to get the previous command and
03:18 type: space hyphen e space within single quotes puts space 1+2 and
03:30 press Enter.
03:32 We get the output as "Hello World" and 3.
03:36 Let's switch back to our slide.
03:38 We will now learn about Interactive Ruby.
03:42 Interactive Ruby allows the execution of Ruby commands with immediate response.
03:48 You can run Ruby statements and examine the output and the return values.
03:53 For older version of Ruby, install the irb separately.
03:57 Now, let us execute our Ruby code through 'irb'. Go to the terminal.
04:03 Type "irb" and press Enter
04:06 to launch the Interactive Ruby.
04:09 Type: puts space within double quotes Hello World and press Enter.
04:19 We get the output as Hello World
04:22 and we get the return value as nil.
04:25 To exit from irb , type exit and press Enter.
04:31 You can also run the Ruby program from a file.
04:34 You can use any text editor of your choice to write the code.
04:39 I am using gedit text editor. Let me switch to gedit text editor.
04:45 Now, type: puts space within double quotes Hello World .
04:54 Let's learn how to add multiple line or block comments.
04:59 Before the puts command,
05:01 type: equal to begin and press Enter.
05:06 equal to begin is used to start the comment.
05:10 Type the comments that you wish to add.
05:13 I will type: "My first Ruby program"
05:20 and press Enter.
05:22 Then type: "This code will print helloworld" and press Enter.
05:30 Now, type: equal to end.
05:32 equal to end is used to end the multiple line comments.
05:37 Comments are useful to understand the flow of program.
05:41 It is useful for documentation.
05:45 Now, let us save the file by clicking on the Save button.
05:50 It is a good practice to save the file frequently.
05:53 The Save As dialog-box appears on your screen.
05:57 Browse the location where you want to save the file.
06:01 On Desktop, I will create a folder named "rubyprogram".
06:06 We will save the file inside this folder.
06:10 In the Name text-box, type the name that you wish to add.
06:14 I will type "hello.rb".
06:17 dot rb extension is given to a Ruby file.
06:21 Then click on the Save button to save the file. So, the file is saved now.
06:28 To execute the code, go to the terminal.
06:32 Let's clear the terminal first.
06:35 Make sure that you are in the directory where your Ruby file is present.
06:39 Remember that we are in the home directory. We need to go to the sub-directory rubyprogram.
06:47 To do so, type: cd space Desktop/rubyprogram and press Enter.
07:00 Let's execute the file. Type: ruby space hello dot rb and press Enter.
07:10 We get the output as "HelloWorld".
07:13 Now, let me demonstrate the difference between puts and print statements.
07:18 We will try this out using "irb".
07:22 Before that, we need to go back to our home directory. To do so, type "cd" and press Enter.
07:31 Now, type "irb" and press Enter to launch the Interactive Ruby.
07:39 Type: puts space within double quotes Hello comma within double quotes World .
07:50 Here, comma is used to join the two puts commands together.
07:55 Now, press Enter.
07:57 We get the output Hello, World, but on the separate lines.
08:03 Now, let's try the same thing with print.
08:06 Press up-arrow key to get the previous command.
08:09 Replace puts with print and press Enter.
08:14 We get the output as Hello World but on the same line.
08:19 The keyword puts adds a newline to the end of the output. The keyword print does not.
08:27 The keyword print outputs only what we have provided.
08:31 This brings us to the end of this Spoken Tutorial. Let us switch back to our slide.
08:37 In this tutorial, we have learnt:
08:39 About Ruby, Installation
08:42 Execution of Ruby code
08:44 Adding multiple comments using =begin and =end
08:50 Difference between puts and print.
08:53 As an assignment,
08:55 write a program to print your name and age.
08:58 We used multiple line comments in this tutorial.
09:01 Try to give single line comment.
09:04 Watch the video available at the following link.
09:07 It summarizes the Spoken Tutorial project.
09:10 If you do not have good bandwidth, you can download and watch it.
09:15 The Spoken Tutorial Project team:
09:17 Conducts workshops using spoken tutorials.
09:20 Gives certificates to those who pass an online test.
09:24 For more details, please write to: contact@spoken-tutorial.org
09:30 Spoken Tutorial project is a part of the Talk to a Teacher project.
09:34 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
09:41 More information on this mission is available at the below link.
09:45 This is Afrin Pinjari from IIT Bombay, signing off.
09:50 Thank you for watching.

Contributors and Content Editors

Devraj, PoojaMoolya, Pratik kamble, Ranjana, Sandhya.np14, Sneha

Retrieved from "https://script.spoken-tutorial.org/index.php?title=Ruby/C2/Hello-Ruby/English-timed&oldid=33068"