Ruby/C3/while-and-until-Looping-Statements/Gujarati

Time	Narration
00:01	Ruby (રૂબી) માં while (વ્હાઈલ) અને until (અનટીલ) લૂપ પરનાં ટ્યુટોરીયલમાં સ્વાગત છે.
00:06	આ ટ્યુટોરીયલમાં આપણે આપેલનો ઉપયોગ કરવાનું શીખીશું-
00:09	while loop (વ્હાઈલ લૂપ)
00:10	until loop (અનટીલ લૂપ)
00:11	redo (રીડૂ)
00:12	અને break (બ્રેક)
00:13	આપણે વાપરી રહ્યા છીએ
00:14	ઉબુન્ટુ આવૃત્તિ 12.04
00:17	રૂબી 1.9.3
00:20	આ ટ્યુટોરીયલનાં અનુસરણ માટે, તમારી પાસે ઇન્ટરનેટ જોડાણ હોવું જરૂરી છે.
00:25	સાથે જ તમને લીનક્સ આદેશો, ટર્મિનલ અને ટેક્સ્ટ-એડીટરની પણ જાણકારી હોવી જોઈએ.
00:29	જો નથી, તો સંદર્ભિત ટ્યુટોરીયલો માટે, અમારી વેબસાઈટની મુલાકાત લો.
00:34	એ પહેલા કે અમે શરુ કરીએ, યાદ કરી લો કે આપણે પહેલા ttt ડીરેક્ટરી બનાવી હતી.
00:38	ચાલો એ ડીરેક્ટરીમાં જઈએ.
00:41	ત્યારબાદ ruby hyphen tutorial (રૂબી હાયફન ટ્યુટોરીયલ) અને looping hyphen statements (લૂપીંગ હાયફન સ્ટેટમેંટ્સ) માં.
00:46	હવે જો કે આપણે તે ફોલ્ડરમાં છીએ, ચાલો આગળ વધીએ.
00:50	રૂબીમાં વ્હાઈલ લૂપનું સીન્ટેક્સ આપેલ પ્રમાણે છે:
00:54	while “boolean expression” (વ્હાઈલ “બૂલીયન એક્સપ્રેશન”)
00:56	ruby code (રૂબી કોડ)
00:57	end (એન્ડ)
00:58	ચાલો એક ઉદાહરણ જોઈએ.
01:01	Create a new file in gedit as shown in the basic level Ruby tutorials.
01:05	Name it while hyphen loop dot rb
01:09	I have a working example of the while loop.
01:13	Now let us switch to the terminal and type gedit space while hyphen loop dot rb space & (ampersand)
01:24	You can pause the tutorial, type the code as we go through it.
01:28	I have declared a while loop in this example.
01:32	First, I declared a local variable i and initialized it with value 0.
01:38	Then I declare a while loop.
01:41	This loop will execute as long as the variable i is greater than -10.
01:46	The puts method is declared within the while loop will display the output.
01:51	After the output is displayed, we decrement the value of i by 1.
01:56	i will adopt this decremented value before the next iteration.
02:01	The variable i gets decremented in every iteration.
02:04	This goes on till i reaches the value -10,
02:09	At this point the while condition fails.
02:12	It subsequently breaks out of the loop and stops printing the output.
02:16	Now, let us switch to the terminal and type ruby space while hyphen loop dot rb and see the output.
02:30	The output will consist of a list of numbers 0 through -9.
02:35	You should now be able to write your own while loop in Ruby.
02:40	Let's look at the until loop next.
02:43	The syntax for the until loop in Ruby is -
02:45	until “boolean expression”
02:47	ruby code
02:48	end
02:50	Let us look at an example.
02:52	Now let us switch to a terminal and type gedit space until hyphen loop dot rb space & (ampersand)
03:03	You can pause the tutorial, and type the code as we go through it.
03:07	I have declared an until loop in this example.
03:12	We had declared a local variable i and initialized it to 0.
03:16	Then we declare an until loop.
03:18	This loop will execute as long as the variable i is greater than -10.
03:23	The puts method will display the output.
03:27	After the output is displayed, value of i is decremented by 1.
03:32	i will adopt this decremented value before the next iteration.
03:36	The variable i gets decremented during every iteration.
03:40	This goes on till i reaches the value -11.
03:43	At this point the until condition fails.
03:46	Subsequently, it breaks out of the loop and stops printing the output.
03:51	Now switch to the terminal and type ruby space until hyphen loop dot rb and see the output.
04:03	The output will consist of a list of numbers 0 through -10.
04:08	You should now be able to write your own until loop in Ruby.
04:13	Let's now move on to the redo construct.
04:16	The syntax for redo in Ruby is as follows:
04:20	a collection of objects.each do item
04:25	a conditional statement
04:27	ruby code
04:28	redo
04:29	end conditional
04:30	end loop
04:32	I have a working example of the redo loop.
04:35	Now let us switch to the terminal and type gedit space redo hyphen loop dot rb space &(ampersand )
04:48	You can pause the tutorial, and type the code as we go through it.
04:52	I have declared an each loop in this example.
04:55	We have declared an each loop to iterate through numbers 10 to 20.
05:00	Then, we define an if conditional statement.
05:04	The loop will execute for every number between 10 to 20.
05:08	It will enter the inner conditional if conditional block only if the value of i is equal to 20.
05:15	The puts method declared within the each loop displays the output.
05:20	Once the program enters the if conditional block, it will first print the output.
05:24	Then it will execute redo.
05:28	redo will execute the iteration of the most internal loop.
05:31	It will do so without checking the loop condition.
05:34	Our condition being if i == 20.
05:38	The result will be an infinite loop, since the value of i will not change from 20.
05:43	Let's switch to the terminal and type ruby space redo hyphen loop dot rb
05:52	and see the output.
05:53	The output will consist of an infinite loop that never ends.
05:58	Press Ctrl + C to terminate the infinite loop
06:03	Now, let us look at the break statement.
06:06	The syntax for the break statement in Ruby is -
06:10	a looping statement
06:12	a conditional statement
06:13	break
06:14	end conditional
06:16	ruby code
06:17	end loop
06:18	Let us look at an example.
06:21	Now let us switch to the terminal and type gedit space break hyphen loop dot rb space ampersand.
06:33	You can pause the tutorial, and type the code as we go through this example.
06:38	I have declared an each loop in this example.
06:41	It is similar to the one we used earlier.
06:43	The puts method here will display the output for numbers 11 to 19.
06:49	Once the value becomes 20, the program enters the conditional if block.
06:54	At this point, it will encounter the break statement and break out of the loop.
06:59	Now open the terminal and type
07:02	ruby space break hyphen loop dot rb
07:05	and see the output.
07:08	The output will consist of numbers 10 through 19.
07:13	Now you should be able to create your own break construct.
07:17	This brings us to the end of this Spoken Tutorial.
07:20	Let's summarize.
07:22	In this tutorial we have learnt to use
07:24	while loop
07:25	until construct
07:26	redo
07:27	break construct
07:29	As as assignment
07:31	Consider a range of numbers 100 to 115(inclusive) represented as Fahrenheit.
07:38	Write a Ruby program using
07:40	the appropriate loop construct
07:42	that uses the Fahrenheit to Celsius conversion formula
07:46	against the given range of numbers
07:49	To display the output: “The temperature has reached a certain degree Celcius and has become unbearable”
07:55	when the temperature in Celcius is above 32 degree Celcius
08:00	આપેલ લીંક પર ઉપલબ્ધ વિડીયો નિહાળો.
08:03	તે સ્પોકન ટ્યુટોરીયલ પ્રોજેક્ટનો સારાંશ આપે છે.
08:07	જો તમારી પાસે સારી બેન્ડવિડ્થ ન હોય તો, તમે વિડીયો ડાઉનલોડ કરીને જોઈ શકો છો.
08:10	સ્પોકન ટ્યુટોરીયલ પ્રોજેક્ટ ટીમ :
08:13	સ્પોકન ટ્યુટોરીયલોનાં ઉપયોગથી વર્કશોપોનું આયોજન કરે છે.
08:15	જેઓ ઓનલાઈન પરીક્ષા પાસ કરે છે તેઓને પ્રમાણપત્રો આપે છે.
08:19	વધુ વિગતો માટે, કૃપા કરી contact@spoken-tutorial.org પર લખો
08:25	સ્પોકન ટ્યુટોરીયલ પ્રોજેક્ટ ટોક ટુ અ ટીચર પ્રોજેક્ટનો એક ભાગ છે.
08:29	જેને આઈસીટી, એમએચઆરડી, ભારત સરકાર મારફતે શિક્ષણ પર નેશનલ મિશન દ્વારા આધાર અપાયેલ છે.
08:35	આ મિશન પર વધુ માહિતી spoken-tutorial.org/NMEICT-Intro પર ઉપલબ્ધ છે.
08:44	આઈઆઈટી બોમ્બે તરફથી હું, જ્યોતી સોલંકી વિદાય લઉં છું. જોડાવાબદ્દલ આભાર.

Contributors and Content Editors

Jyotisolanki, PoojaMoolya