C_21 Operators Precedence and Associativity in C | C programming Tutorials
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- Опубліковано 19 вер 2024
- In this Video, I have discussed Operators Precedence and Associativity in C Language.
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#operatorsinc
--a*(5+b)/2-c++*b
--0*(5+1)/2-(-1)++*1
Firstly we evaluated which is written in bracket
--0*6/2-(-1)++*1
Now we evaluate postfix increment op
--0*6/2+1*1
We write +1 bcz in postfix firsly value assigned then value incremented
After postfix increment we evaluate prefix decrement
-1*6/2+1*1
We know that * and / has same precidence and associativity is from left to right
-6/2+1*1
-3+1*1
We know that +has lower precidence than * then * evaluated first
-3+1
=-2
Hence answer is -2
For me it's the ever most helpful comment, that I ever read on this earth. Ya, there are some gems on earth, in which you are the one. Smile because you're unique. Thanks for helping me out to understand it in form of a comment 😊
can you explain the post fix increment. -1++ is 0 right?
@@aakashyericharla8668 no this is not right bcz in postfix firstly we put value then incremented
That means (-1)++=-1
Hi, can u explain what is post increment and dercrement after the step of 5+1 pls. I am school student.. I will be grateful
@@kkkkkkk754 in post increment we firstly assigned the value then incremented.
Eg. int a=2;
printf("a=%d",a++);
It gives output a=2 then a becomes 3.
In post decrement we firstly assigned the value then it is decremented .
Eg. int a=2;
printf("a=%d",a- -);
It gives you the output a=2 then a becomes 1.
Hints:-
Incremented means plus 1
Decremented mean minus 1
Q . --a * (5 + b) / 2 - c++ * b
given a = 0, b = 1, c = -1;
ans = -2
explaination-
firsty bracket will be evaluated
so it will give 6
now evaluate --a, it will give -1 since we are pre decrementing 0
now, -1*6 = -6
now -6/2=-3
then -3 - (-1)*b(due to post fix the value of c will remain same )
will give -3 +1*1(since b is given as 1)
hence -3+1=-2 ans
After brackets c++ na postfix increment has higher precendence that. Prefix
Thnx for ur gd expln abt the c++
Wrong ans
He is right you can compile it
@@rutujajadhav1782 I got -3? is it correct
Shortcut to remember the operator precedence table in C…
Use PUMA' S REBL TAC. ( spell "REBL" as if "REBEL").
(Note: all operators with associativity not specified is left to right).
P - Primary
U - Unary
M - Multiplicative
A - Additive
S- Shift
R- Relational
E- Equality
B- BitWise ( & > ^ > |)
L- Logical ( logical && > logical ||)
and the last three operators are
T- Ternary
A- Assignment
C- Comma
If you need a shortcut for Assosiativity then "AUTo rides in the right side", meaning Assignment, Unary and Ternary operators are Right to Left, O is added for completion)
Super bro no need to see video
kis channel se padthe ho
thanks
Ans = -2
- -a * (5+b) / 2 - c++ * b
- -a * 6 / 2 - - 1 * b (#(),++,#)
- 1 * 6 / 2 +1 * b (#- -, -,# )
- 3 + 1 (#* ,/ ,*#)
- 2 (#+#)
Operation done on the previous line is commented with # inside the bracket in the new line, in other of operation precedence and separate by non-computing commas.
I didn’t use compiler anyways, but you are free to point out mistakes if found😅
You didn't increment the value of c by 1.
@@omarfaruque1095 it was a post increment, so c was evaluated before being incremented, as such it remain as -1 as shown in the second line
@@Dr._Aniekan_udo apt. Followed the same reasoning and compiled to verify my answer
I think it's after the program runs for the first time, then when it runs the second time it will increment to 1 because it's a postfix. That's how the postfix program runs. If it was a prefix it will increment from 0 to 1 the first time it runs.
Thank you sir
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... 🙏🙂
👍
Waiting from last 5 days.. Happy to see you in my notification 🙂🙂
--a will decrement the value of a by 1 and return the new value (-1).
5+b will add 5 to the value of b (which is 1) and return 6.
--a*(5+b) will multiply the result of step 2 by the result of step 1, which gives -6.
/2 will divide the result of step 3 by 2, which gives -3.
c++ will return the current value of c (-1) and then increment it by 1 (to become 0).
c++*b will multiply the result of step 5 by the current value of b (which is 1), which gives 0.
-3-0 will subtract the result of step 6 from the result of step 4, which gives -3.
Therefore, the output of the expression --a*(5+b)/2-c++*b will be -3.
but -2 is given by computer
@@ElectricalsSolutions -3+1 will become -2
Wrong
C++ means post increment so value of c used is -1 but in output in you print c you will get zero. In program c=-1 will be used. Now you will get -2 as the answer.
Compiler Answer : -2
but what i understood from your lecture:
int a=0,b=1,c=-1;
int k= --a *(5+b)/2-c++*b;
--a *6/2-c++*b
--a *6/2-0*b
-1 *6/2-0*b
-6/2-0*1
-3-0*1
-3-0
-3
tell me where i am wrong??
You didn't take c++=-1
@@yashkumar-lg1jq why?
c is already -1 .and after c++ it becomes 0
@@ankitrawat978 bhai post increment hai
Yaa i got the same answer
teaching "extraordinary, fanstatic and mind blowing mam salute mam😇"
Ans is -2
Thanks a lot Mam
how i couldn't got it
--a*(5+b)/2-c++*b
here, a=0, b=1, c=-1
--0*(5+1)/2-(-1)++*1
brackets, postfix have the same precedence(highest), therefore we have to go from left to right
--0*6/2+1*1
now the prefix has the highest precedence in the above expression,
-1*6/2+1*1
now * / have the highest precedence in the above expression, to break the tie we from left to right,
-3+1
now + has has the highest precedence in the above expression,
-2
We have the values of the variables as,
a=-1, b=1, c=0
Excellent teaching mam , no words for your teaching
11:03 #include
int main()
{
int a=0,b=1,c=-1;
printf("%d",--a*(5+b)/2-c++*b);
return 0;
}
output: -2
working: --a*(5+b)/2-c++*b => -1*6/2+1*1 => -3+1 => -2
Mam your videos is easily understandable for me on UA-cam platform... Thank you mam for this course🙏
Your work is awesome Mama. Your courses of the C language are the best I found on the internet.
You're really good at explaining things clearly. Good job.
Mam ur teaching is marvelous this is what a beginner expects
int a=0,b=1,c=-1;
- -a * (5+b)/2 - c+ + * b.................. ['/ ' is higher precedence than '*']
-1 * 3 - -1 * 1.......................... [value of a will increment first , c is now incremented to 0{-1+1=0}]
-3 - -1..................['*' have higher precedence value than '-']
-3 + 1 = -2 ( output)
-2 is my final answer
a= -1
b= 1
c= 0
If it is right please let me know jenny mam
Welcome Back and HnewY 2021 Lecturer Jenny, wish you higher advancement in this year and I promise you to be a good programer because of you.
Step by step any thing is possible
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Watched your whole ds algo videos...
Really helpful for me..
Keep making such videos🙏
Big thanks to you ma'am , what a smoothness and how u can transmit ur knowledge is just amazing 👏 👌 ❤
Nice one. Thank you.
This part need more clarification and workouts as most of the entrance exams have bunch of questions from this area.
To my knowledge, none of the books in market covering this area fully. There is always a grey area where people get confusions.
If possible, please comeup with more videos with more sample questions from placement question papers and show with step by step explanation in detail. Thanks once again.
dear mam thank you will be very less for your videos , praying for all happiness n success to u n to ur family , i m benefited a lot by your videos , you are an excellent teacher
Videos are good as talking about the explanation, but I am wishing project based tutorial as these videos totally like as some online Computer Engineering Quick Guides. If you could do it I would be very thankful to you ,MAM!, as I am just in 9th. Please..
I just watched your previous videos of many months before and you know what you have become chubby and cute 😍😍❤️.....love from South India ❤️❤️🔥
do we have to learn this???to solve, but how will i learn such a big table? any short trick? like bodmas or something?
Best teacher ever
You have a great way of teaching but i want to say that I laugh 🤣 when you scream 'now' out of nowhere 😆.
😂
😂
🤣
Am getting -3 as the ans
Maam u r soo cute
And through your teaching pattern I'll learn more and more....
U r amazing😍
Love from FoET lucknow CSE(AI). ❤
Thank you so much mam
aap kitna hard work karti h mam
Mam u r so pretty..❤ and a good teacher also..😊
-3 will be correct answer..
--a * (5 + b) / 2 - c++ * b
given a = 0, b = 1, c = -1;
--a * (5 + b) / 2 - c++ * b
-1*(5+1)/2-0*1 (--a becomes -1,The value of a is updated to -1 becuase its a prefix dcrement and c is postfix increment so it will be update -1 to 0).
-1*6/2-0*1
-1*6/2-0
-6/2-0
-3 ans................
Correct
Tq mam clearly understood 😊
I have seen c programming topic video. Amazing presentation.
You are a very experienced and skill in teaching mam .... really
Mam thanks 😊 .
I m beginner 🔰 mam give a video how to start
Best teacher i have ever seen
ans = -3
is it right ?
Happy New Year Madam G.. Thanks Jii
Sister plz Jarvis Al tell us how to do as your teaching is very understandable and interesting and easy to learn
🤣🤣
Great Guide ma'am
Keep Spreading knowledge 🥰
I kindly Request . To Pls Make Videos on Python As soon as possible mam ❤️ . Because we are Addicted to u 🙏☺️
Is FINAL answer -3?
Mine is -1
Super bro
Bro explanation pls ?
-3
-3 ans
Mam discuss about Python course step by step please.....🙏🙏🙏🙏🙏
Thankyou very much❤️
Answer is -3.
Very use ful
I need online ' c 'course
How run the c program in system
Thank you mam for the owsmful video🙏❤️
Mam can u give a more clarity about postfix and prefix with an example
I usually watch your videos they so well and I like them. thanks so much.
I would ask you do you know anyone who would teach me data structure and java programming. I'm going to pay for the service.
Sister after c++ course jarvis Al mam plz
Great going mam 🔥🔥
answer is -2 mam
for the last expression
Thanks a lot ma'am 😍😍😇😇
a=o
b=1
c=-1
--a*(5+b)/2-c++*b
=0*6/2-c++*b
=0*6/2-2*b
=0-2
=-2
Ans is -2
Thanks ma'am
Post inc. Will increase value after that statement... That's why -3
@@anjanhalder7164 can u plz elaborate?
My output is just showing -2
Ans is -2. I was wrong.
@Prajwal @Anjan Halder @VISHAL AWATI Please tell me about the --a when the a is an integer and it's value can be -1 after the --a?🤔
Wrong
Thank you mam for your effort ...
#friend_of_minds
I could not solve why when a=0, b=1, c=-1 why --a*(5+b)--c++*b comes out to be -2
What is the output? Mine is -3
yup
-2 is the output
@@sahilyadav2146 is that correct
@@mani6896 yes
I too got-3👍👍
12.30-( answer is -2 mam)
Can u explain?
I was learning from u r vedios only mama
ua-cam.com/video/qI29eAhdJIc/v-deo.html
Mam add more languages like C++ and JAVA please
Nice maam ur inspiration for me
Thank you
Mam please check priority of postfix (++ and --) is left to right or right to left?????
Left to Right
Mam next course plz add c++ course mam 🙏🙏🙏
Thank u mam for 💓 💓 💓
What is the difference between uniary + and binary +
a=0
b=1
c=-1
--a*(5+b)/2-c++*b ans=0 I dont no answer is correct .
jeeny mam please the separate voide
thanx you are great well madam.....
My thanks goes to u mam
Madam please upload solving towers of honoi problem in data structures
Mam please python programming video from basic
Mam aap English kitna simple bolte ho 👌👌🤗🤗
Nice teach mam ❤️❤️
Mam do videos on python programming language
so basically we check the associativity (if of the same priority) from the expression
super i love you for ur teaching🥰🥰🥰🥰🥰🥰🥰🥰
Super teaching mam
Pls post the lectures in bulk!!!!if possible!!and u r the best after shukla sir!!
Who is Shukla Sir ?
May I know the channel name ?
@@RashidKhan-wj7cp ua-cam.com/channels/D-scAE4ju78dld1kpcsQfQ.html
Hey Jenny did you make a video how to deal with functions? Thanks!
Thank you ❤
Thank you so much mam😊😊😊😊😊
Super
Good explanation mam
--a * (5+b)/2 - c++ * b
Value will be -2
How please explain
Areh i compile this code in my laptop it is coming as 1 ..i didnt understood how 1 is coming
@@learncseasily3385 Its -2 not 1.
You might have compiled it wrongly.
@@handekarilingojivarasaikri782 yes yes i got it by mistakely i have writen -a instead of - - a 😅
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Awesome sister.... After C language kindly update a Playlist on oops based language C++ that would be more helpful sister... Thank you..
Thank you so much
12:40
Answer : -2
Can u explain?
It is right answer
@@shoba2212
-1*6/2-(-1)*1
-1*6/2+1*1
-6/2+1
-3+1
-2
C has postfix increment then y it still be -1, the value must change to 0 I guess..pls clarify
@@madhukasturi9953 yeah I think ansr is -4
-2 is ans ....checked in ide
Thank you mam 😀
How to run c program in terbo c++
Explain what are errors will come how to correct errors
ta mam...lecture was quite good
Ans is -2.
int main()
{
int a = 0, b = 1, c = -1,res;
res = --a*(5+b)/2-c++*b;
printf("%d",res);
return 0;
}
ans is -2
My answer is -2
Thank you sow Match miss
Output:-3
Correct
-2 is correct answer
@@siddharthvs1770 incorrect
mam please consider explaining functions and storage classes in c prog..... mam please please please 👨🎓👨🎓
In manual calculation am getting a value as -3 but in compiler am getting -2, why it's so???
apparently, even if you evaluate c++ first, since it is post fix, the value will remain unchanged in the expression, thus you'll have
-1 * 6 / 2 - (-1) * 1