C_20 Operators in C - Part 8 | Comma Operator | C Programming Tutorials

[@sanilshekhawat7967]

Ma'am hats off to ur knowledge, i m ur student from last one year and very glad nd thankful for everything u taught us....thank you so much from the depth of my heart....🙏🏿🙏🏿🙏🏿🙏🏿

[@SandeepSingh-xn5by]

value of a=10, value of b=2 ;, by following the right shift shortcut mathod

[@harshitsatya5291]

Thanks a lot This is the best videos on operators I have seen ever.

[@shacks05]

kindly Request . To Pls Make Videos on Python As soon as possible mam ❤️ . Because we are Addicted to u 🙏☺️

[@sivajilaveti7308]

👍

[@divya_barge2096]

(a++, ++a, a>>2); == 2 because first value will be avoided and last value will be stored in the computer memory.

[@apputadhiyal9451]

Yeah I also got the same answer😃

[@richieabbugamingff498]

yess

[@divya_barge2096]

@@richieabbugamingff498 same ans?!!🙃

[@yakuzaoyabun5640]

And what about the value of a ? Will it be 2 or 10?

[@status_beatz_1]

@@yakuzaoyabun5640 2

[@nithinreddyannem4535]

Answer is 2 for b=(a++,++a,a>>2)

[@shreekarshetti1406]

@@0xDEAD-C0DE Ask the same thing in the interview too when encountered a que

[@ishfaqahmad3594]

Let's break down the expression and the code to understand the values of `a` and `b`. ### Code Analysis: ```c int b, a = 2; b = (a++, ++a, a >> 2); printf("%d ", a); printf("%d", b); ``` 1. **Initialization**: ```c int b, a = 2; ``` Here, `a` is initialized to 2, and `b` is declared but not initialized yet. 2. **The comma operator**: The comma operator `(a++, ++a, a >> 2)` evaluates each expression from left to right, but only the **rightmost expression** (`a >> 2`) is the value assigned to `b`. So let's evaluate the comma operator step by step: - **`a++`**: This increments `a` after its current value is used. So, in this case: - `a` is initially 2. - `a++` uses the value 2 but increments `a` to 3. - **`++a`**: This increments `a` before using its value. After `a++`, `a` was already incremented to 3, so now `++a` increments `a` to 4. - **`a >> 2`**: After the previous two operations, `a` is now 4. The expression `a >> 2` means a bitwise right shift of `a` by 2 positions. Shifting 4 (binary `100`) right by 2 positions gives `1` (binary `001`). **So, `b = 1` because `a >> 2` results in 1**. 3. **Final value of `a`**: After the comma expression, `a` is left as `4`. 4. **`printf()` statements**: - `printf("%d ", a);` will print the value of `a`, which is `4`. - `printf("%d", b);` will print the value of `b`, which is `1`. ### Summary: - **The value of `a`** is `4`. - **The value of `b`** is `1`. ### Output: ``` 4 1 ```

[@misturaojulari9707]

12:49 a = 2 b = 2 a = 2 because the value of a will also be updated to 2

[@kavisingh5509]

Ma'am I like ur video very much the English language you used is very easy and understandale to me mam you are awesome👏✊👍 mam from where you did your graduation? Which books you studied and please also reccomend us book

[@Anjali-ek1tj]

10:02 int a; a = printf ("Jenny"),2,3,4; Ans: Jenny 2 Because initialisation is already done in first step and after printf and comma is used so it doesn't show error

[@All_linone]

But it assign the the value 4 thre is two more comma

[@SanjanaManupati]

But why I am getting Jenny as output 4 is not printed in the output 😢

[@srvocals1646]

11:48 jenny5 (output) since word jenny has five letters ,so the output is jenny5.

[@Liam-10]

int a = 8; in binary it means 00001000 And a >> 2 means that we'll eliminate the first 2 bits and then it will be 00000010 = 2 in decimal ✅👌

[@grishitha4795]

answer is 3

[@luckybanthia]

you have solved my doub't... i'm gathering here and there for the answer but didn't get int a= (2,7,9) o/p = 9....*but finally i got my answer.. thank you mam*

[@fuadhamedmohamed4311]

b=(a++,++a,a>>2) the Answer will be 2. mam you are good teacher thnks for your healping.

[@ishfaqahmad3594]

Let's break down the expression and the code to understand the values of `a` and `b`. ### Code Analysis: ```c int b, a = 2; b = (a++, ++a, a >> 2); printf("%d ", a); printf("%d", b); ``` 1. **Initialization**: ```c int b, a = 2; ``` Here, `a` is initialized to 2, and `b` is declared but not initialized yet. 2. **The comma operator**: The comma operator `(a++, ++a, a >> 2)` evaluates each expression from left to right, but only the **rightmost expression** (`a >> 2`) is the value assigned to `b`. So let's evaluate the comma operator step by step: - **`a++`**: This increments `a` after its current value is used. So, in this case: - `a` is initially 2. - `a++` uses the value 2 but increments `a` to 3. - **`++a`**: This increments `a` before using its value. After `a++`, `a` was already incremented to 3, so now `++a` increments `a` to 4. - **`a >> 2`**: After the previous two operations, `a` is now 4. The expression `a >> 2` means a bitwise right shift of `a` by 2 positions. Shifting 4 (binary `100`) right by 2 positions gives `1` (binary `001`). **So, `b = 1` because `a >> 2` results in 1**. 3. **Final value of `a`**: After the comma expression, `a` is left as `4`. 4. **`printf()` statements**: - `printf("%d ", a);` will print the value of `a`, which is `4`. - `printf("%d", b);` will print the value of `b`, which is `1`. ### Summary: - **The value of `a`** is `4`. - **The value of `b`** is `1`. ### Output: ``` 4 1 ```

[@18fatima15]

10:07 Jenny 12:26 #include int main() { int a=8,b; b=(a++,++a,a>>2); printf("%d %d",a,b); return 0; } output: 10 2

[@noone0978]

10:05 it will give error 12:25 it will give a=10 and b=2 because b is 2.5 but as we are writing integer, so float value will be neglected

[@amanmomin7798]

a=2 not 10 if I am wrong then explain me

[@Hasini-p6c]

No at 10:05 it prints..... Jenny 4

[@Hasini-p6c]

It doesn't give error

[@abdulrahimjalloh363]

#include #include int main () { int a; a=printf("Jenny"),2,3; return 0; } //Output is "Jenny"

[@srinukanuparthi2500]

For a=8 b=(a++,++a,a>>2) b=a++,++a Output is b=2 a=10

[@leaderrr_shivam]

why the value of a is 10. please tell me because after evaluating a>>2 expression it's value is 2 i.e., is returned to b. so, a value will also be 2 only. why it is 10? please answer me.

[@vanshikagarg7586]

b=(a++,++a,a>>2) Output =2

[@leaderrr_shivam]

why the value of a is 10. please tell me because after evaluating a>>2 expression it's value is 2 i.e., is returned to b. so, a value will also be 2 only. why it is 10? please answer me.

[@nithiya8418]

Mam ur DS playlist really helped me a lot for exam prep... please make a playlist for Computer architecture also mam... the subject sounds so vague pl help mam... 🙏🙂

[@tirumalaramanarajuv7473]

Yes mam

[@ganesh_nama]

madam thanks i cleared my concept..,post and pre for inc and dec..

[@anshikabansal5642]

Yr teaching style is Awesome mam❤

[@markmonn]

The explanations are really good!

[@sairampolisetty2059]

14:11 output is a=10,b=2

[@handekarilingojivarasaikri782]

If we print a value also then Output : Jenny 5 As there are 5 letters are their in word "Jenny"

[@instabeauty50M]

Output : Jenny5

[@PankajPFilms]

Answer is 2. For b=(a++,++a,a>>2)

[@lalitharamachandra6659]

Mam I got a=10,b=2 12:27

[@maryannemuthoni5388]

a = printf("Jenny"), 2,3,4; Answer is Jenny b = (a++, ++a, a>>2); value assigned to b will be a>>2 which in the end is 2, value of a is 10

[@varahapadmaja8157]

Answer is jenny5

[@harishbadam7554]

Main{ int a=0,b=0; a=(b=75)+9; printf("%d,%d",a,b) } Can you explain above what output we will get

[@rehanchoudhury1937]

a,b=2 , as ++ is having more presedence then >> , the number would be 10, in binary 1010 >>2= 10 (i.e 2)

[@cricket_addicted_guys]

#include int main() { int a; a=printf("jenny"),2,3; printf("%d",a); return 0; } /*output : jenny5 Mam here I got jenny along with 5 I think we are using format specifier %d and data type int...so it give the length of the string */

[@vamsipolamarasetti8003]

Bro, for me its coming like "code has no effect "

[@preetham36]

put bracket for a=(print("jenny),2);

[@Thejasree...]

Yeah,if we don't use printf("%d",a) ,we will get the output as jenny

[@khushbuanuragi8697]

b=(a++,++a, a>>2) a=10 and b=2

[@nuthankumar8454]

hi

[@leaderrr_shivam]

why the value of a is 10. please tell me because after evaluating a>>2 expression it's value is 2 i.e., is returned to b. so, a value will also be 2 only. why it is 10? please answer me.

[@rukayatmuhammed3670]

int a = printf("jenny"), 2, 3, 4 Solution: Here, It is an error, but [printf("Jenny")] will still be executed, which results in the output of [jenny5], because the world [Jenny] has 5 characters... So output will be [Jenny5] Thank you ma'am

[@makrynub9256]

where did the 5 came from???

[@dianawanguiw3669]

​@@makrynub9256its the number of character used inside the printf function printf("Jenny")

[@ananthu4141]

​​@@dianawanguiw3669why it will be printed... I think only "jenny" will be printed 😐there's nothing to give the character count.. 😐

[@abdulrahimjalloh363]

If i can take you to the moon and stars i should have done that 🙂, thanks mam, you made it easy for us.

[@sankalpphadke4938]

a=10 b=2 a value doesn't change, b value will be a/2² =10/4 =2

[@rohithsai9046]

can you explain in detail please😕

[@sankalpphadke4938]

@@rohithsai9046 We have a=8, b. Q. b=(a++,++a,a>>2); As per video b will take value of last operant i.e a>>2 but first two operant will evaluate from left to right. First a++. a become 9 Then ++a. a become 10 in a>>2 We use shortcut like If >> operater is used divide (/) value a with given value 2²=4 If these operater square the value of given number). In our case >> this operater is used so b= (10/2²) b= 10/4 b= 2 b gets value 2 because we are using int as our datatype, *If we use float then b value change to 2.5. (We can't use float if we are using bit/shift operators)

[@akhilsugaraju3905]

@@sankalpphadke4938 hi sir I agree with answer But can you tell me which has more precedence ++ or >>

[@udaysingh6621]

@@akhilsugaraju3905 ++

[@kuttu960]

Ma'am I had a doubt..!??? b=(a++, ++a, a>>2); in this equation b=2 is the answer...!! But the value stored in the A change in each stage. a++ = 9 ++a = 10 a>>2 = 2 So my doubt is the new value stored in the A=2, so I think it couldnt be 10. So the value be B=2 , A=2 Plzz give reply....

[@ishfaqahmad3594]

Let's break down the expression and the code to understand the values of `a` and `b`. ### Code Analysis: ```c int b, a = 2; b = (a++, ++a, a >> 2); printf("%d ", a); printf("%d", b); ``` 1. **Initialization**: ```c int b, a = 2; ``` Here, `a` is initialized to 2, and `b` is declared but not initialized yet. 2. **The comma operator**: The comma operator `(a++, ++a, a >> 2)` evaluates each expression from left to right, but only the **rightmost expression** (`a >> 2`) is the value assigned to `b`. So let's evaluate the comma operator step by step: - **`a++`**: This increments `a` after its current value is used. So, in this case: - `a` is initially 2. - `a++` uses the value 2 but increments `a` to 3. - **`++a`**: This increments `a` before using its value. After `a++`, `a` was already incremented to 3, so now `++a` increments `a` to 4. - **`a >> 2`**: After the previous two operations, `a` is now 4. The expression `a >> 2` means a bitwise right shift of `a` by 2 positions. Shifting 4 (binary `100`) right by 2 positions gives `1` (binary `001`). **So, `b = 1` because `a >> 2` results in 1**. 3. **Final value of `a`**: After the comma expression, `a` is left as `4`. 4. **`printf()` statements**: - `printf("%d ", a);` will print the value of `a`, which is `4`. - `printf("%d", b);` will print the value of `b`, which is `1`. ### Summary: - **The value of `a`** is `4`. - **The value of `b`** is `1`. ### Output: ``` 4 1 ```

[@rishabhgupta2364]

a = printf( "jenny" ),2,3,4; Answer a= 4

[@PavaniGummadipudi-ot7kn]

Thank you mam for your kind information for c programming tutorials thanks a lot mam

[@rathore_shubham02]

a = 4 b = 2 Right answer !

[@Liam-10]

int a; a = jenny , 2 ,3 ,4; a = jenny; Because without brackets we get the first value

[@vasumeduri5103]

Mam for b=(a++,++a,a>>2); The value of b=2 The value of a=10 Thank you mam

[@SN-edits4u]

No, a also updates it's value as a>>2

[@leaderrr_shivam]

why the value of a is 10. please tell me because after evaluating a>>2 expression it's value is 2 i.e., is returned to b. so, a value will also be 2 only. why it is 10? please answer me.

[@Liam-10]

@@leaderrr_shivam For a it will be 10 because it works with each value but for b it will be only 8 because it works only with last value and after shifting right it will become 2 . For a:- int = 8; a++ = 9; ++a = 10; For b:- int a = 8; in binary it means 00001000 And a >> 2 means that we'll eliminate the first 2 bits and then it will be 00000010 = 2 in decimal ✅👌

[@zzye553]

b = 2 finall result ma'am. Since a++ and ++a will be operated and rejected then the a>>2 will be assigned to be,

[@ankittripathi420]

Sbse phle hmne dekha aur seekha

[@vinayaksalagar3098]

Tq mam have a great job

[@abhayrajnegi6847]

Mam please make video on recursion . It will really help in understanding ds

[@zubairmalik9614]

Outstanding ...from pakistan

[@devSackey]

a = 10; b = 2; printf("Thanks jenny");

[@leaderrr_shivam]

why the value of a is 10. please tell me because after evaluating a>>2 expression it's value is 2 i.e., is returned to b. so, a value will also be 2 only. why it is 10? please answer me.

[@devSackey]

@@leaderrr_shivam lets take the question: int a = 8, b; 1.b = (a++, ++a, a>>2) solution; here the comma acts as an operator and its associativity is from left to right: therefore from the question a= 8; a++ is a post increment operator (i.e the original value of a ( which is 8) will be executed and after execution it will increase to 9. ++a is a pre increment operator so the value of a(which is now 9 from post increment) will be increased to 10 during execution; a >> 2 = 10 >> 2; = 2.5 but remember the a is an integer so only the value 2 will be printed, hence a >> 2 = 2; i hope this explanation helps;

[@leaderrr_shivam]

@@devSackey okay bro. thanks

[@devSackey]

@@leaderrr_shivam Always welcome bro

[@SadhanaSharma]

12:10 how a++ becomes 9 ? It is a post increment na so 8 should be assigned na 🤔🤔

[@funnycharacter650]

(a++,++a,a>>2) a=4 b=2 Because in this the right shift highest priority thats why it gives a=2 Then in bracket all operators are comma then the associativity left to right Then Already a=2 is stored After a++ a=3 After ++a a=4 Then the b=2 because (a++,++a,2)

[@CHETANBHAGATH]

Printf ("Chetan")2,3,4; Value will be 6

[@makrynub9256]

how its evaluating the string like that ???

[@JayPatel-ou2ud]

Nice explanation thanks mam 🙏🙏

[@syedalifathimaa9618]

int a=printf("jenny"),2,3,4; output=> Error because in initialization without bracket, it acts as separator b=(a++,++a,a>>2); output=> 2 ; a has 10, b has 2

[@k.annpurnamma3357]

Sir You have a youtube channel right Please upload your doughts in c program and also what you written

[@rathodkaran9297]

Its not showing error

[@saurajitnayak5696]

Hlw, in mam question it is not assigned with character so output will be only jenny

[@godza4735]

It will print Jenny

[@jayeshkoli3876]

11:40 output is - jenny 2 jenny didi please like if o/p is right.

[@justcode......2254]

13:56 value of a is 10 and b is 2

[@vishakha8342]

When int a=(5,4); Output will be 4, then why to put 5 in the first place? What's the use of it?

[@vinaymalik5437]

Mam please 🙏 complete the playlist of DAA as soon as possible 🙏🙏🙏🙏🙏🙏🙏

[@gauravpratapsingh8526]

❣❣❣explained in easy way❣❣

[@ganesh_nama]

Dear Mam good Morning, i have executed the statement :

[@aditiraj8147]

Ma'am ans of a=printf("Jenny"),2,3,4; Will be Jenny234. & Ans of b=(a++,++a, a>>2) will be 2

[@001aariffarooqbhat7]

How sir it will b Jenny234

[@001aariffarooqbhat7]

I think only jenny will b op

[@tps8470]

Thanks a Lot Mam

[@meghanakondeboina4808]

For the first one the vwlue assingned to the b is 2 And the second is 8

[@uttej1390]

Mam please start c++ language after c mam🙏🙏🙏 btw happy New year 🎉🎉🎉

[@HariRam-ik8xz]

a=2 b=2 Results

[@nikhilbhardwaj9000]

mam plzz make lectures in hindi too i learn fast with hindi explaination

[@peterricky7461]

Last problem answer=a=8,b=2

[@durgalankipalli2541]

Will get a= Jenny, Other one a=10, b=2

[@mahabubulalam1346]

int a = 8, b; b =( a++, ++a,a>>2); a = 10 b = 2

[@Tijiyabhanu]

Yes I got the same

[@dayawary2958]

Ma'am pls object oriented programming k upar v video banaiyi 🙏🙏🙏

[@rutujavaidya938]

Please ma'am

[@NOOR-dy6yn]

last question a = 10 b = 2

[@shubhambhatt2704]

Mam please do make a video on functions in c

[@alone0.722]

09:58 mam the right answer in 4

[@Dipanshu________Rajput]

a & b will be 2 answer

[@Liam-10]

Thank you so much Ms Jenny ☺️❤️

[@kuntalbhowmick5020]

#include void main() { printf(" %d %d %d",printf("A"),printf("BB"),printf("CCC")); } OUTPUT CCCBBA 1 2 3 Madam, can you please explain why the printf statements are executed from right to left. But when I write the following code #include void main() { if(printf("A"),printf("BB"),printf("CCC")) ; } Output is "ABBCCC". I am not understanding.

[@handekarilingojivarasaikri782]

Output : a=10 b=2

[@rohithsai9046]

hey, can you explain a bit please🥺

[@Dunniio]

@@rohithsai9046 b = (a++,++a,a>>2) At a++ , a will be 9 At ++a , a will be 10 At a>>2 , 10/2^2 = 10/4 which will be 2.5 but only 2 will be returned So a=10 and b=2

[@lionking6431]

Excuse me mam in ur channel, there is programming,DAA,DBMS,data structure,and algorithms,dynamic programming,os, which is priority to watch first and to learn...??

[@yeshwanthrajsp5876]

Iam going to follow u mam

[@g.kashish2005]

miss for program: #include int main() { int a; a=printf("jenny "),2,3,4; printf("%d",a); return 0; } expected ouput: jenny 2 actual output: jenny 6 even i tried to change a=printf("jenny "),5,6; but everytime it shows jenny 6 whereas when i am taking a=5,4; output :5 that is the initial value can you plz explian this, why is it happening?

[@ShanmukKakarapalli]

The output is adding 1 to the last number madam

[@shishtsharma4330]

in equation int a=8,b; b=a++,++a; mam you said first assignment operator works bur we know that pre increment(++a) priority or precedence is high so why assignment operator works first

[@kartavyasinhgohil8174]

Assignment operator is higher priority compaire to pre increment (++a).

[@elkanamwaigomole8953]

I like your teaching syle, now falling love to u🤘

[@billionaireboy3368]

😍🤘🤘🤘

[@ashishmaurya3409]

kzbin.info/www/bejne/hGq5mqNjqrysh7M

[@hmm7121]

11:43 it counts letters So there are 5 letters in jenny then O/P is:- Jenny5 Is it right?

[@food8814]

same output is coming

[@mohammedansil7587]

Is that an error?? Jenny is not an integer... So how???

[@akhilmahajan8582]

Mam, when will come lecture of statement and looping?

[@ananyaghosh6402]

#include int main() { int a; a = (printf("jenny",2,1)); return 0; } mam this will print" jenny" only.

[@talladvivedulasuryateja9064]

Mam will u give the notes. keep that notes pdf in description pls 🙏

[@drawitnow9319]

maa'am can you please make videos on C++!!

[@yusraah7745]

Yes please

[@anuragsrivastava4562]

Dear Ma'am need your help for data analytics, If the video has already been made by you, i will appreciate if you can share the link with me or please advice the schedule once you plan to upload the tutorial video. Furthermore, requesting you to please complete the DAA tutorial playlist. Looking forward for your guidance Thanks!

[@Rohan-21]

Hi, You initially said that first operand i.e. 5 will be rejected and second operand 4 will be returned. But then again you said 5 will be printed.

[@Rohan-21]

Got the doubt cleared. Thanks for the explanation.

[@ashishmaurya3409]

kzbin.info/www/bejne/hGq5mqNjqrysh7M

[@swetakumari6641]

I also get this confusion?

[@godza4735]

I think she's meaning when there''s a brackets then will return rightmost value but if there are not brackets left value will be return

[@tithighosh2169]

Thank you ma'am ❤️❤️.

[@tpallavi2097]

Upload the next lecture also mam...

[@alexandertom2859]

Waiting for next video ,mam

[@adityakodati1816]

Please do vedios on python programming please 🙏🙏🙏🙏

[@hareeshkumar9554]

a=10,b=2 i get mam..tq mam

[@mahbubanimmi9579]

How did you slove?

[@tpallavi2097]

Do the lecture on loops mam

[@b3ast915]

Hello mam,i am 1st yr cse student at nit warangal. Mam, i have 2 yr gap bewtween 12th and start of btech. 1yr complete drop and 1 yr partial drop from nit jalandhar mechanical. Mam, how will it affect my placement? Pls help🙏🙏

[@ashishkumar-fd4gp]

yes but don't loose hope ....all the best for your future

[@Devi.v2-h9c]

mam i think that it will print the value of a

[@hariparuchuru3858]

when a>>2 the op will be a=10 and b=2.

[@its_himanshu_agarwal7888]

a = printf("jenny"),2,3,4 then a = printf("jenny")

[@Unknown-uo7yy]

lecture of member selection operators( . , ->) are missing

[@chanabasayyasindagimath9516]

Wishing happy New year & G B Y TO TEACHER

[@chanabasayyasindagimath9516]

Thanks and congrats...Mdm Teacher

[@chanabasayyasindagimath9516]

Thanks for your English conversation

[@shivaprasad8919]

Ma'am please make a vedio on tracing of tower of henoi. Although lot of lectures avoilable in KZbin regarding TOH no one is explaining the tracing of recursive calls. All are talking logically actually that makes no sense. Please take this appeal to consideration. Looking forward to TOH tracing...

[@ashishmaurya3409]

kzbin.info/www/bejne/hGq5mqNjqrysh7M