Ruby/C2/Arithmetic-and-Relational-Operators/Gujarati

Time	Narration
00:01	Ruby. મા Arithmetic & Relational Operators પર ના સ્પોકન ટ્યુટોરીયલમા તમારુ સ્વાગત છે.
00:06	આ ટ્યુટોરીયલમા આપણે શીખીશું
00:08	Arithmetic Operators (એર્થમેટીક ઓપરેટર્સ)
00:10	Operator Precedence (ઓપરેટર પ્રેસીડન્સ)
00:12	Relational Operators (રીલેશનલ ઓપરેટર્સ)
00:14	અહી આપણે વાપરી રહ્યા છીએ Ubuntu Linux version 12.04 Ruby' 1.9.3
00:23	આ ટ્યુટોરીયલ અનુસરવા તમે Linux માં ટર્મિનલ અને ટેક્સ્ટ એડિટર વાપરવા વિશે જાણ હવી જોઈએ.
00:28	તમે IRB પરિચિત હોવા જોઇએ
00:31	જો નહિં, તો સંબંધિત ટ્યુટોરિયલ્સ માટે, અમારી વેબસાઇટ જુઓ
00:34	હવે ચાલો આપણે એરિથમેટિક ઓપરેટરો વિશે શીખીએ.
00:38	Ruby પાસે નીચેના એરિથમેટિક ઓપરેટરો છે.
00:42	+Addition: ઉદાહરણ. a+b.
00:45	- Subtraction: ઉદાહરણ. a-b.
00:48	/ Division: ઉદાહરણ. a/b.
00:51	* Multiplication: ઉદાહરણ. a*b.
00:55	% Modulus: ઉદાહરણ. a%b.
00:59	** Exponent : ઉદાહરણ a**b
01:04	irb. વાપરીને આ એરિથમેટિક ઓપરેટરો ને ચકાસીશું.
01:08	Ctrl, Alt અને T કીઓ એક સાથે દાબીને ટર્મિનલ વિન્ડો ખોલો.
01:14	ટર્મિનલ વિન્ડો તમારી સ્ક્રીન પર દ્રશ્યમાન થાય છે.
01:17	interactive Ruby. ને શુરુ કરવા માટે ટાઈપ કરો irb અને Enter દબાઓ.
01:21	ટાઈપ કરો 10 plus 20 અને Enter. દબાઓ.
01:25	એડીશનલ ઓપરેશન થાય છે અને પરિણામ 30 ડિસ્પ્લે થાય છે.
01:31	તેવી જ રીતે બાદબાકી અને ગુણાકાર ઓપરેશન્સ કરી શકાય છે.
01:35	ચાલો ડિવિઝન ઓપરેટર પ્રયાસ કરો.
01:38	ટાઈપ કરો 10 slash 4
01:40	અને Enter. દબાઓ.
01:42	અહી તમે જોઈ શકો છો,કે પરિણામ સ્ન્શીપ્ત રૂપમાં સંપૂર્ણ નંબર ૨ ના નજીક જાય છે.
01:47	વધુ ચોક્કસ જવાબ મેળવવા માટે, આપણેfloat તરીકે એક નંબર વ્યક્ત કરવાની જરૂર છે
01:52	ટાઇપ કરો 10.0 slash 4
01:56	અને Enter. એન્ટર દબાઓ.
01:58	આપણને જવાબ 2.5 તરીકે મળે છે.
02:01	ચાલો હવે 'મોડ્યુલસ' ઓપરેટર પ્રયાસ કરો.
02:05	The modulus ઓપેરેટર રીમાઈનડર તરીકે આઉટપુટ આપે છે.
02:09	ટાઈપ કરો 12 percentage sign 5 અને Enter દબાઓ.
02:15	અહીં 12 , 5 વિભાજીત કરવામાં આવે છે અને 2 રીમાઈનડર પાછુ મળ્યું છે.
02:21	હવે ચાલો exponent ઓપરેટર પ્રયાસ કરો
02.24	ટાઈપ કરો 2' પછી બે વાર એસ્ટ્રીક અને પછી 5' અને Enter. દબાઓ.
02:32	This means that 2 is raised to the power of 5.
02:36	So we get the output as 32.
02:39	Next, let us learn about operator precedence.
02:44	When several operations occur in a mathematical expression,
02:47	each part is evaluated
02:50	and resolved in a predetermined order called operator precedence.
02:56	This means that the operator which has highest priority is executed first.
03:01	This is then followed by the next operator in the priority order and so on.
03:07	This slide lists all operators from highest precedence to lowest.
03:13	For example 3 + 4 * 5 returns 23 and not 35
03:23	The multiplication operator (*) has higher precedence than the addition operator (+)
03:29	and thus will be evaluated first.
03:32	Hence four fives are twenty and then three is added to 20 to give the output as 23
03:42	Lets us see some more examples based on operator precedence.
03:47	Let's go back to the terminal.
03:50	Press Crtl and L keys simultaneously to clear the irb console.
03:56	Now type 7 minus 2 multiply by 3
04:03	and press Enter
04:05	We get the answer as 1.
04:08	Here the asterisk symbol has higher priority than the minus sign.
04:13	So the multiplication opertion is performed first and then subtraction is performed.
04:20	Lets us see an another example.
04:22	Type Within brackets 10 plus 2 slash 4
04:29	and Press Enter
04:30	We get the answer as 3.
04:33	In this case () bracket has the higher priority than division (slash)
04:39	So the operation inside the bracket that is addition is performed first.
04:44	Then division is performed.
04:47	Now, let us learn about Relational Operators.
04:51	Let's switch back to slides.
04:54	Relational operators are also known as comparison operators.
04:59	Expressions using relational operators return boolean values.
05:04	Relation Operators in Ruby are
05:07	== Equals to Eg. a==b
05:14	dot eql question mark Eg. a.eql?b
05:21	!= Not equals to Eg. a exclamation equal b
05:28	Less than Eg. a < b
05:32	Greater than Eg. a > b
05:37	<= Lesser than or equal to Eg.a less than arrow equal b
05:44	>= Greater than or equal to Eg.a greater than arrow equal b
05:49	<=> Combined comparison Eg.a less than arrow equal greater than arrow b
05:56	Now let us try some of these operators.
06:00	Go to the terminal.
06:02	Press ctrl, L keys simultaneously to clear the irb console.
06:09	Lets us try equals to operator.
06:11	So type 10 equals equals 10
06:16	and Press Enter
06:17	We get the output as true.
06:20	.eql? opeartor is same as equals to operator.
06:24	Lets try it out
06:25	Now type 10 .eql?10 and Press Enter
06:33	We get the output as true
06:35	Now lets try not equal to operator.
06:39	Type 10 not equal 10
06:44	And Press Enter
06:46	We get the output as false.
06:48	This is because the two numbers are equal.
06:51	Clear the irb console by pressing Ctrl, L simultaneously.
06:56	Let us now try less than operator.
07:00	Type 10 less than 5 and Press Enter
07:05	Here if first operand is less than second then it will return true
07:10	otherwise it will return false
07:14	We get the output as false because 10 is not less than 5
07:19	We will now try greater than operator
07:22	Type 5 greater than 2
07:26	Here if first operand is greater than second then it will return true
07:31	otherwise it will return false
07:34	Press Enter
07:36	In this case, we get the output as True because 5 is indeed greater than 2
07:42	Clear the irb console by pressing Ctrl, L simultaneously
07:47	We will now try the less than equal to operator
07:51	Type 12 less than equal 12
07:56	and Press Enter
07:59	Here if first operand is less than or equal to second then it returns true
08:04	otherwise it returns false
08:07	We get the output as True because 12 is equal to 12
08:11	You can try out the greater than or equal to operator likewise.
08:15	Now let's try the combined comparision operator.
08:19	The combined comparision operator
08:21	Returns 0 if first operand equals second
08:24	Returns 1 if first operand is greater than the second and
08:29	Returns -1 if first operand is less than the second operand
08:34	Let's see how it works with an example
08:36	Type 3 less than equals greater than 3
08:41	And Press Enter
08:43	We get the output as 0
08:45	because both the operands are equal i.e. both are three
08:50	Now, let's change one of the operands to 4
08:53	Type 4 less than equals greater than 3
08:58	And Press Enter
08:59	We get the output as 1
09:01	Since 4 is greater than 3
09:04	Now, let's change this example again
09:07	Type 4 less than equals greater than 7
09:11	And Press Enter
09:13	We get the output as -1
09:14	Since 4 is less than 7
09:17	As an assignment
09:19	Solve the following examples using irb and check the output
09:24	10 + bracket 2 astreisk 5 bracket 8 slash 2
09:32	4 astreisk 5 slash 2 plus 7
09:37	Also, try arithmetic operators using methods
09:42	This brings us to the end of this Spoken Tutorial.
09:45	Let's summarize
09:47	In this tutorial we have learnt about
09:49	Arithmetic Operators plus minus astreisk slash standing for addition, subtraction, multiplication, division.
09:59	Operator Precedence
10:01	Relational Operators
10:04	using many examples
10:06	Watch the video available at the following link.
10:10	It summarises the Spoken Tutorial project.
10:14	If you do not have good bandwidth, you can download and watch it.
10:18	The Spoken Tutorial Project Team :
10:20	Conducts workshops using spoken tutorials
10:23	Gives certificates to those who pass an online test
10:26	For more details, please write to contact@spoken-tutorial.org
10:32	Spoken Tutorial Project is a part of the Talk to a Teacher project.
10:36	It is supported by the National Mission on Education through ICT, MHRD, Government of India.
10:43	More information on this Mission is available at spoken hyphen tutorial dot org slash NMEICT hyphen Intro
10:51	This script has been contributed by the spoken tutorial team IIT Bombay
10:57	And this is Anjana Nair signing off Thank you

Contributors and Content Editors

Jyotisolanki, PoojaMoolya