PERL/C2/Conditional-statements/Gujarati

Time	Narration
00:01	Welcome to the spoken tutorial on if and if-else conditional statements in Perl.
00:07	In this tutorial, we will learn about; Time Narration 00:01 Welcome to the spoken tutorial on if and if-else conditional statements in Perl. 00:07 In this tutorial, we will learn about; 00:09 if statement and 00:11 if-else statement in Perl 00:12 I am using Ubuntu Linux12.04 operating system and Perl 5.14.2 00:20 I will also be using the gedit Text Editor. 00:24 You can use any text editor of your choice. 00:28 You should have basic knowledge of Variables and Comments in Perl. 00:33 Knowledge of for, foreach , while and do-while loops in Perl will be an added advantage. 00:40 Please go through the relevant spoken tutorials on the spoken tutorial website. 00:45 Perl provides the following conditional statements - 00:49 if 00:50 if-else 00:51 if-elsif-else and 00:53 switch 00:54 In this tutorial, we'll cover if and If-else statements 00:59 if statement in Perl can be used 01:01 to execute a piece of code only when a specified condition is satisfied. 01:07 The syntax of if conditional statement is as follows 01:11 if space open bracket condition close bracket space Open curly bracket 01:19 Enter 01:20 Piece of code semicolon, to be executed when the condition is true 01:25 Enter, Close curly bracket 01:29 The code inside the if statement will be executed only when the condition is true. 01:36 Now let us look at an example of if statement. 01:40 Open the Terminal and type 01:43 gedit conditionalBlocks dot pl space &(ampersand ) 01:49 and press Enter 01:52 This will open the conditionalBlocks.pl file in gedit. 01:57 Type the following piece of code as displayed on the screen. 02:02 Here we have specified a condition for if which checks the value of variable count. 02:09 Note the equal to equal to sign here. This is the comparison operator. 02:15 The condition $count equal to equal to 5 is checked against the value of variable count. 02:23 When it is equal to 5, the code within the if block will get executed. 02:28 Now, press ctrl+s to save the file. 02:32 Then switch to the terminal. 02:36 Make sure that you are in the directory in which you have saved your file. 02:41 Type the following to check for any compilation or syntax error - 02:46 perl hyphen c conditionalBlocks dot pl 02:53 and press Enter. 02:55 The following line will be displayed on the terminal window 02:59 conditionalBlocks.pl syntax OK 03:04 As there is no compilation or syntax error, we will execute the Perl script by typing - 03:10 perl conditionalBlocks dot pl 03:14 and press Enter 03:16 The following output will be shown on terminal. 03:19 I am inside if statement 03:23 Switch back to gedit 03:26 Alternately, we can write the above if statement as- 03:31 print space double quotes I am inside if statement slash n close double quotes space if open bracket dollar count space equal to equal to space 5 close bracket semicolon. 03:57 Now, let us look at if-else statement. 04:01 This statement is used when user wants to execute 04:06 one piece of code when the condition is true and 04:09 another piece of code when the condition is false 04:13 The syntax for if-else condition is as follows - 04:17 if space open bracket condition close bracket space open curly bracket Press Enter. 04:27 piece of code semicolon 04:29 to be executed when if condition is true, 04:32 Press Enter 04:34 close curly bracket space else space open curly bracket Enter 04:41 another piece of code semicolon 04:43 to be executed when if condition is false 04:47 Press Enter close curly bracket 04:51 Now again, go to the conditionalBlocks.pl file which we have already created in gedit. 04:58 Assign 4 to count variable then at the end of the if block type space 05:07 else 05:09 space open curly bracket press Enter 05:14 print space double quotes I am inside else statement slash n close double quotes semicolon 05:30 Press Enter and close curly bracket. 05:34 Here, 4 is assigned to variable $count. 05:38 As the value of count variable does not match 5, 05:43 the code within the if block will not get execute 05:47 instead the code within the else block will get execute. 05:52 Now press Ctrl+S to save the file. 05:56 Now switch to terminal. 05:59 and type perl hyphen c conditionalBlocks dot pl to check for any compilation or syntax error 06:11 now, press Enter 06:13 The following line will be displayed on the terminal 06:17 conditionalBlocks.pl syntax OK 06:20 As there is no compilation or syntax error, we will now execute the Perl script. 06:27 Type perl conditionalBlocks dot pl 06:33 and press Enter 06:35 The following output will be shown on terminal. 06:39 I am inside else statement 06:44 Let us summarize. 06:46 In this tutorial, we have learnt - 06:49 if and 06:50 if-else conditional statements in Perl 06:53 using sample programs. 06:55 Here is assignment for you - 06:57 Print “It is an open source language” 07:01 when the variable declared has value 'Perl' 07:04 otherwise print “It's a proprietary language” 07:08 Watch the video available at the following link 07:11 It summaries the Spoken Tutorial project 07:15 If you do not have good bandwidth, you can download and watch it 07:20 The Spoken Tutorial Project Team 07:22 Conducts workshops using spoken tutorials 07:26 Gives certificates to those who pass an online test 07:31 For more details, please write to contact at spoken hyphen tutorial dot org 07:37 Spoken Tutorial Project is a part of the Talk to a Teacher project 07:42 It is supported by the National Mission on Education through ICT, MHRD, Government of India. 07:50 More information on this Mission is available at spoken hyphen tutorial dot org slash NMEICT hyphen Intro 08:00 Hope you enjoyed this Perl tutorial. 08:04 This is Amol Brahmankar signing off. 08:06 Thanks for joining.
00:09	if statement and
00:11	if-else statement in Perl
00:12	I am using Ubuntu Linux12.04 operating system and Perl 5.14.2
00:20	I will also be using the gedit Text Editor.
00:24	You can use any text editor of your choice.
00:28	You should have basic knowledge of Variables and Comments in Perl.
00:33	Knowledge of for, foreach , while and do-while loops in Perl will be an added advantage.
00:40	Please go through the relevant spoken tutorials on the spoken tutorial website.
00:45	Perl provides the following conditional statements -
00:49	if
00:50	if-else
00:51	if-elsif-else and
00:53	switch
00:54	In this tutorial, we'll cover if and If-else statements
00:59	if statement in Perl can be used
01:01	to execute a piece of code only when a specified condition is satisfied.
01:07	The syntax of if conditional statement is as follows
01:11	if space open bracket condition close bracket space Open curly bracket
01:19	Enter
01:20	Piece of code semicolon, to be executed when the condition is true
01:25	Enter, Close curly bracket
01:29	The code inside the if statement will be executed only when the condition is true.
01:36	Now let us look at an example of if statement.
01:40	Open the Terminal and type
01:43	gedit conditionalBlocks dot pl space &(ampersand )
01:49	and press Enter
01:52	This will open the conditionalBlocks.pl file in gedit.
01:57	Type the following piece of code as displayed on the screen.
02:02	Here we have specified a condition for if which checks the value of variable count.
02:09	Note the equal to equal to sign here. This is the comparison operator.
02:15	The condition $count equal to equal to 5 is checked against the value of variable count.
02:23	When it is equal to 5, the code within the if block will get executed.
02:28	Now, press ctrl+s to save the file.
02:32	Then switch to the terminal.
02:36	Make sure that you are in the directory in which you have saved your file.
02:41	Type the following to check for any compilation or syntax error -
02:46	perl hyphen c conditionalBlocks dot pl
02:53	and press Enter.
02:55	The following line will be displayed on the terminal window
02:59	conditionalBlocks.pl syntax OK
03:04	As there is no compilation or syntax error, we will execute the Perl script by typing -
03:10	perl conditionalBlocks dot pl
03:14	and press Enter
03:16	The following output will be shown on terminal.
03:19	I am inside if statement
03:23	Switch back to gedit
03:26	Alternately, we can write the above if statement as-
03:31	print space double quotes I am inside if statement slash n close double quotes space if open bracket dollar count space equal to equal to space 5 close bracket semicolon.
03:57	Now, let us look at if-else statement.
04:01	This statement is used when user wants to execute
04:06	one piece of code when the condition is true and
04:09	another piece of code when the condition is false
04:13	The syntax for if-else condition is as follows -
04:17	if space open bracket condition close bracket space open curly bracket Press Enter.
04:27	piece of code semicolon
04:29	to be executed when if condition is true,
04:32	Press Enter
04:34	close curly bracket space else space open curly bracket Enter
04:41	another piece of code semicolon
04:43	to be executed when if condition is false
04:47	Press Enter close curly bracket
04:51	Now again, go to the conditionalBlocks.pl file which we have already created in gedit.
04:58	Assign 4 to count variable then at the end of the if block type space
05:07	else
05:09	space open curly bracket press Enter
05:14	print space double quotes I am inside else statement slash n close double quotes semicolon
05:30	Press Enter and close curly bracket.
05:34	Here, 4 is assigned to variable $count.
05:38	As the value of count variable does not match 5,
05:43	the code within the if block will not get execute
05:47	instead the code within the else block will get execute.
05:52	Now press Ctrl+S to save the file.
05:56	Now switch to terminal.
05:59	and type perl hyphen c conditionalBlocks dot pl to check for any compilation or syntax error
06:11	now, press Enter
06:13	The following line will be displayed on the terminal
06:17	conditionalBlocks.pl syntax OK
06:20	As there is no compilation or syntax error, we will now execute the Perl script.
06:27	Type perl conditionalBlocks dot pl
06:33	and press Enter
06:35	The following output will be shown on terminal.
06:39	I am inside else statement
06:44	Let us summarize.
06:46	In this tutorial, we have learnt -
06:49	if and
06:50	if-else conditional statements in Perl
06:53	using sample programs.
06:55	Here is assignment for you -
06:57	Print “It is an open source language”
07:01	when the variable declared has value 'Perl'
07:04	otherwise print “It's a proprietary language”
07:08	Watch the video available at the following link
07:11	It summaries the Spoken Tutorial project
07:15	If you do not have good bandwidth, you can download and watch it
07:20	The Spoken Tutorial Project Team
07:22	Conducts workshops using spoken tutorials
07:26	Gives certificates to those who pass an online test
07:31	For more details, please write to contact at spoken hyphen tutorial dot org
07:37	Spoken Tutorial Project is a part of the Talk to a Teacher project
07:42	It is supported by the National Mission on Education through ICT, MHRD, Government of India.
07:50	More information on this Mission is available at spoken hyphen tutorial dot org slash NMEICT hyphen Intro
08:00	Hope you enjoyed this Perl tutorial.
08:04	This is Amol Brahmankar signing off.
08:06	Thanks for joining.

Contributors and Content Editors

Jyotisolanki, PoojaMoolya