BASH/C3/Arrays-and-functions/English-timed - Revision history

Pratik kamble at 11:42, 23 March 2017

2017-03-23T11:42:50Z

Pratik kamble at 11:42, 23 March 2017

2017-03-23T11:42:37Z

Pratik kamble at 10:16, 7 March 2017

2017-03-07T10:16:26Z

Sandhya.np14 at 02:57, 15 July 2015

2015-07-15T02:57:21Z

Sandhya.np14 at 02:54, 15 July 2015

2015-07-15T02:54:05Z

Sandhya.np14 at 08:48, 6 July 2015

2015-07-06T08:48:50Z

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Pratik kamble: Created page with "{| border=1 |'''Time''' |'''Narration''' |- | 00:01 | Dear friends, Welcome to the spoken tutorial on '''Arrays & functions''' |- | 00:07 | In this tutorial, we will learn..."

2014-11-20T05:58:21Z

Created page with "{| border=1 |'''Time''' |'''Narration''' |- | 00:01 | Dear friends, Welcome to the spoken tutorial on '''Arrays & functions''' |- | 00:07 | In this tutorial, we will learn..."

New page

{| border=1
|'''Time'''
|'''Narration'''

|-
| 00:01
| Dear friends, Welcome to the spoken tutorial on '''Arrays & functions'''

|-
| 00:07
| In this tutorial, we will learn

|-
|00:11
| To pass an '''array''' to a''' function '''

|-
|00:14
|Use of''' exit '''statement in a '''function'''

|-
|00:17
| Use of '''return''' statement in a '''function'''

|-
|00:20
| With the help of some examples

|-
| 00:24
| To follow this tutorial you should have knowledge of '''Shell Scripting.'''

|-
|00:29
|You should also have knowledge of '''arrays '''and '''if statement '''in BASH.

|-
|00:36
|If not, for relevant tutorials please visit our website which is as shown,'''http://www.spoken-tutorial.org'''

|-
| 00:43
| For this tutorial I am using''' '''

|-
|00:46
| '''Ubuntu Linux''' 12.04''' '''Operating System and

|-
|00:50
| '''GNU BASH''' version 4.2

|-
|00:54
|Please note,''' GNU Bash''' '''version 4''' or above is recommended to practice this tutorial.

|-
|01:02
| Let us first learn how to pass an '''array''' to a '''function,''' and its usage.

|-
| 01:09
| Let me open a file '''function_(underscore)array dot sh'''

|-
|01:15
| This is the '''shebang line.'''

|-
|01:18
| Our '''function''' name is '''array_(underscore) display'''

|-
|01:22
|Open curly brace opens the '''function definition.'''

|-
| 01:27
|The use of '''Dollar @(at-sign)''' was explained in previous tutorials in this series.

|-
|01:34
|Basically, it is used to print all '''arguments''' passed to a '''function.'''

|-
|01:40
|'''Dollar @ (at sign) within round brackets '''stores '''array elements '''in variable ''''array'.'''

|-
|01:47
| '''Dollar''' opening curly brace '''array''' within square bracket @(At-sign) closing curly brace

|-
|01:55
|This line of code displays all the '''elements '''of an '''array.'''

|-
|02:00
| '''Dollar''' opening curly brace array within square bracket one closing curly brace

|-
|02:08
|This line of code displays the second '''element''' of the '''array'''

|-
| 02:14
| '''Operating_systems '''is declared with the elements '''Ubuntu, Fedora, Redhat '''and''' Suse'''

|-
| 02:22
| Here, '''array operating_systems''' is passed to the '''function''' '''array_display'.'''

|-
|02:29
| The syntax to pass an '''array''' to a '''function''' is '''function_name''' space '''dollar''' opening curly brace '''array_name''' within square bracket '''@(At sign)''' closing curly brace

|-
| 02:45
| Come back to our program.

|-
|02:48
| Similarly, '''colors''' is declared with the '''elements''' '''White, green, red '''and''' blue'''

|-
|02:57
|Here, '''array colors''' is passed to the '''function''' '''array_display'''

|-
|03:02
| Now let's save the file and go to the '''terminal'''.

|-
|03:07
| Type '''chmod space plus x space function underscore array dot sh'''

|-
|03:18
|Press '''Enter.'''

|-
|03:19
| Type '''dot slash function underscore array dot sh'''

|-
|03:25
|Press''' Enter.'''

|-
|03:27
| As we can see, '''array elements '''of ''''operating_systems'''' and ''''colors' '''are displayed.

|-
|03:33
|And the '''second array element''' of ''''operating_systems'''' and ''''colors'''' are also displayed.

|-
|03:41
| In '''Bash''', ''''exit' '''and''' 'return' statements '''gives status code of a '''function''' or a program.

|-
| 03:49
|The '''return''' statement will return to the script from where it was called.

|-
|03:54
|'''exit '''statement will end the entire script from where it is encountered.

|-
| 04:01
| Let us learn these 2 ways to '''return''' within a '''function.'''

|-
|04:06
| Let me open a file ''''return_exit.sh''''

|-
|04:12
| This is the''' shebang line.'''

|-
| 04:14
| Function name is '''return_(Underscore)function '''

|-
| 04:18
| Open curly brace opens the '''function definition.'''

|-
|04:22
| This '''if statement '''compares two variables.

|-
|04:27
|If the two variables are equal, then commands in ''''if'''' are executed.

|-
|04:33
| This '''echo statement '''displays the message

|-
|04:36
|'''This is return function.'''

|-
|04:39
| '''return 0 '''moves the control from '''function''' to main program with status code 0(zero).

|-
|04:47
| Note that the statements after '''return''' will not be executed in a '''function'''.

|-
| 04:54
| '''fi''' indicates the end of '''if statement'''

|-
|04:58
| Here the '''function '''name is''' exit_(Undescore)function '''

|-
|05:02
| The '''if statement '''here compares two variables.

|-
|05:06
| If the two variables are equal, then the commands in ''''if'''' are executed.

|-
| 05:14
| This '''echo statement '''displays the message '''"This is exit function"'''

|-
|05:19
| '''exit 0''' will terminate the program.

|-
| 05:23
| '''fi''' indicates the end of this '''if statement.'''

|-
| 05:27
| This is a '''function call '''with arguments''' 3''' and '''3.'''

|-
|05:33
| This displays the message '''"We are in main program"'''

|-
|05:38
| This is another '''function call''' with '''arguments 3 '''and '''3.'''

|-
|05:44
| This '''echo statement '''displays the message '''"This line is not displayed"'''

|-
| 05:49
| Note that '''exit''' will terminate the program.

|-
|05:53
|Anything after '''exit''' will not be executed.

|-
|05:58
| Save the file and go to the '''terminal.'''

|-
|06:00
| Type '''chmod space plus x space return underscore exit dot sh'''

|-
|06:09
| Press '''Enter.'''

|-
| 06:12
|Type '''dot slash return underscore exit dot sh'''

|-
|06:18
| Press '''Enter.'''

|-
| 06:20
| The output displays the messages as shown.

|-
| 06:24
|Now, let us understand the flow of the program.

|-
| 06:27
|The control will be in main program, which is the script itself.

|-
|06:33
| The control goes to '''return_function''' because of the '''function call.'''

|-
| 06:39
| As the two variables are equal, it displays the message '"This is return function'''

|-
| 06:47
| Then it encounters '''return 0.'''And the control flows from '''function''' to the statement below the '''function call, '''in the main program.

|-
| 06:59
| Then it displays the message '''We are in main program'''

|-
| 07:03
| After that, the control goes to '''exit_function''' because of the '''function call'''.

|-
| 07:11
|As the two variables are equal, it displays the message '''"This is exit function"'''

|-
| 07:19
|Then it encounters''' exit 0'''. This will terminate the program.

|-
| 07:25
| Any statement after '''exit '''will not be executed.

|-
| 07:30
| Also, the statement '''This line is not displayed''' will not be executed.

|-
| 07:36
| Hope the difference is clear to you.

|-
| 07:39
|Let us now summarise.

|-
| 07:41
| In this tutorial, we learnt

|-
| 07:44
|To pass an '''array''' to a '''function '''

|-
| 07:47
| Use of''' exit''' statement in a '''function'''

|-
| 07:50
| Use of '''return''' statement in a '''function'''

|-
|07:53
|With the help of some examples

|-
| 07:56
| As an assignment.

|-
| 07:57
|Write a program,

|-
| 07:58
| Where a '''function '''adds all the elements in an '''array''' The '''function''' should display the sum of elements.

|-
| 08:07
|Make 2 '''function''' '''calls''' with '''array elements''' (1, 2, 3) and (4, 5, 6)

|-
|08:15
| Watch the video available at the link shown below. http://spoken-tutorial.org /What\_is\_a\_Spoken\_Tutorial

|-
| 08:19
|It summarises the Spoken Tutorial project.

|-
| 08:23
|If you do not have good bandwidth, you can download and watch it.

|-
|08:28
| The Spoken Tutorial Project Team

|-
| 08:30
| Conducts workshops using spoken tutorials Gives certificates to those who pass an online test For more details, please write to contact@spoken-tutorial.org

|-
|08:45
| Spoken Tutorial Project is a part of the Talk to a Teacher project.

|-
| 08:49
|It is supported by the National Mission on Education through ICT, MHRD, Government of India.More information on this Mission is available at the link shown below http://spoken-tutorial.org\NMEICT-Intro

|-
| 09:04
| The script has been contributed by FOSSEE and Spoken-Tutorial teams.

|-
| 09:10
|This is Ashwini Patil from IIT Bombay signing off. Thank you for joining.

|}

@@ Line 137: / Line 137: @@
 |-
 |03:18
-|Press '''Enter.'''
+|Press '''Enter.'''Type: '''dot slash function underscore array dot sh'''
-−
-|-
-|03:19
-| Type: '''dot slash function underscore array dot sh'''
 |-
@@ Line 361: / Line 357: @@
 |-
 | 07:56
-| As an assignment-
+| As an assignment-Write a program
-−
-|-
-| 07:57
-|Write a program
 |-
@@ Line 393: / Line 385: @@
 |-
 | 08:30
-| 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

@@ Line 105: / Line 105: @@
 |-
 | 02:14
-|  '''operating_systems '''is declared with the elements '''Ubuntu, Fedora, Redhat '''and''' Suse'''.
+|  '''operating_systems '''is declared with the elements "Ubuntu", "Fedora", "Redhat" and "Suse".
 |-

@@ Line 45: / Line 45: @@
 |-
 |00:46
-|* '''Ubuntu Linux''' 12.04''' '''Operating System and
+|'''Ubuntu Linux''' 12.04''' '''Operating System and
 |-
 |00:50
-|* '''GNU BASH''' version 4.2
+|'''GNU BASH''' version 4.2
 |-

@@ Line 13: / Line 13: @@
 |-
 |00:11
-|* To pass an '''array''' to a''' function '''
+|To pass an '''array''' to a''' function '''
 |-
 |00:14
-|* Use of''' exit '''statement in a '''function'''
+|Use of''' exit '''statement in a '''function'''
 |-
 |00:17
-|* Use of '''return''' statement in a '''function'''
+|Use of '''return''' statement in a '''function'''
 |-
@@ Line 341: / Line 341: @@
 |-
 | 07:44
-|* To pass an '''array''' to a '''function '''
+|To pass an '''array''' to a '''function '''
 |-
 | 07:47
-|* Use of''' exit''' statement in a '''function'''
+|Use of''' exit''' statement in a '''function'''
 |-
 | 07:50
-|* Use of '''return''' statement in a '''function'''
+|Use of '''return''' statement in a '''function'''
 |-
@@ Line 385: / Line 385: @@
 |-
 | 08:30
-| Conducts workshops using spoken tutorials.Gives certificates to those who pass an online test.
+| Conducts workshops using spoken tutorials.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
 |-

@@ Line 5: / Line 5: @@
 |-
 | 00:01
-| Dear friends, Welcome to the spoken tutorial on '''Arrays & functions'''.
+| Dear friends, welcome to the spoken tutorial on '''Arrays & functions'''.
 |-
@@ Line 33: / Line 33: @@
 |-
 |00:29
-|You should also have knowledge of '''arrays '''and '''if statement '''in BASH.
+|You should also have knowledge of '''arrays '''and ''''if' statement '''in BASH.
 |-
@@ Line 81: / Line 81: @@
 |-
 |01:34
-|Basically, it is used to print all '''arguments''' passed to a '''function.'''
+|Basically, it is used to '''print''' all '''arguments''' passed to a '''function.'''
 |-
@@ Line 97: / Line 97: @@
 |-
 |02:00
-| '''Dollar''' opening curly brace '''array''' within square bracket one closing curly brace
+| '''Dollar''' opening curly brace '''array''' within square brackets one closing curly brace.
 |-
@@ Line 105: / Line 105: @@
 |-
 | 02:14
-|  '''Operating_systems '''is declared with the elements '''Ubuntu, Fedora, Redhat '''and''' Suse'''.
+|  '''operating_systems '''is declared with the elements '''Ubuntu, Fedora, Redhat '''and''' Suse'''.
 |-
 | 02:22
-| Here, '''array operating_systems''' is passed to the '''function''' '''array_display'.'''
+| Here, array '''operating_systems''' is passed to the function '''array_display.'''
 |-
@@ Line 125: / Line 125: @@
 |-
 |02:57
-|Here, '''array colors''' is passed to the '''function''' '''array_display'''.
+|Here, '''array''' '''colors''' is passed to the '''function''' '''array_display'''.
 |-
@@ Line 157: / Line 157: @@
 |-
 |03:41
-| In '''Bash''', ''' 'exit' '''and''' 'return' statements '''give '''status code''' of a '''function''' or a program.
+| In '''Bash''', ''' 'exit' '''and''' 'return' '''statements give '''status code''' of a '''function''' or a program.
 |-
@@ Line 189: / Line 189: @@
 |-
 |04:22
-| This '''if statement '''compares two '''variables'''.
+| This '''if''' statement compares two '''variables'''.
 |-
@@ Line 197: / Line 197: @@
 |-
 |04:33
-| This '''echo statement '''displays the message:
+| This '''echo''' statement displays the message:
 |-
@@ Line 205: / Line 205: @@
 |-
 |04:39
-| '''return 0 '''moves the control from '''function''' to '''main''' program with status code 0(zero).
+| '''return 0 '''moves the '''control''' from '''function''' to '''main''' program with status code 0(zero).
 |-
@@ Line 213: / Line 213: @@
 |-
 | 04:54
-| '''fi''' indicates the end of '''if statement'''.
+| ''''fi'''' indicates the end of ''''if' statement'''.
 |-
 |04:58
-| Here the '''function '''name is''' exit_(Undescore)function '''.
+| Here the '''function '''name is''' exit_(Underscore)function'''.
 |-
 |05:02
-| The '''if statement '''here compares two '''variables'''.
+| The ''''if'''' statement here, compares two variables.
 |-
@@ Line 237: / Line 237: @@
 |-
 | 05:23
-| '''fi''' indicates the end of this '''if statement.'''
+| ''''fi'''' indicates the end of this ''''if' statement.'''
 |-
@@ Line 253: / Line 253: @@
 |-
 |05:44
-| This '''echo statement '''displays the message '''"This line is not displayed"'''.
+| This '''echo''' statement displays the message '''"This line is not displayed"'''.
 |-
@@ Line 301: / Line 301: @@
 |-
 | 06:39
-| As the two '''variables''' are equal, it displays the message '"This is return function'''.
+| As the two '''variables''' are equal, it displays the message '''"This is return function"'''.
 |-
@@ Line 329: / Line 329: @@
 |-
 | 07:30
-| Also, the statement '''This line is not displayed''' will not be executed.
+| Also, the statement "This line is not displayed" will not be executed.
 |-
@@ Line 377: / Line 377: @@
 |-
 |08:15
-| Watch the video available at the link shown below. http://spoken-tutorial.org /What_is_a_Spoken_Tutorial.
+| Watch the video available at the link shown below. http://spoken-tutorial.org/What_is_a_Spoken_Tutorial
 |-
@@ Line 403: / Line 403: @@
 |-
 | 08:49
-|It is supported by the National Mission on Education through ICT, MHRD, Government of India. More information on this mission is available at the link shown below. http://spoken-tutorial.org\NMEICT-Intro
+|It is supported by the National Mission on Education through ICT, MHRD, Government of India. More information on this mission is available at the link shown below. http://spoken-tutorial.org/NMEICT-Intro
 |-