Lec-8: LL(1) Parsing Table | Check Whether a Grammar is LL(1) or Not

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[@areebajunaid4673]

Why didn't we use L' In last production for finding follow of L'

[@user-id4ct8jv9v]

In the second example also he is not using the S right before the | to find the follow of S.Could this be because if we take the follow of the LHS, the LHS is the same symbol?

[@akashbansal5501]

Doubt = Fo(L) = { $ , ) } or not Sir if you see this than please guide

[@codelove9544]

no

[@rohanbatty]

I am guessing this - Follow of the first variable in the parse tree will have Dollar. S is the first variable whereas L and L' are not.

[@mango-strawberry]

@@rohanbatty now it makes sense why $ is not there in the follow of L.

[@tusharsingh6792]

follow of L $ bhi ho skta hai na bcz L->SL' bhi to hai ?

[@apadogwaenchana9036]

Thank you for this sir! With this, i feel a little more relieved for my exam which is due in 7 days.

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[@vinaypadala3864]

i think before doing this, we have to check if there is left factoring in the grammar and remove it.

[@user-um3wf9el3b]

i am very confuse L ka follow ) CLOSE bracket kesy ho skta ha

[@akhakhi1386]

Right hand side 1 rule ne dekho

[@shraddhatiwari2500]

Sir last video me aapne kuchh definition btani thi Like RMD,LMD,LF,LR,RR but the video of that definitions is not available Please make the video sir

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Refer to TOC (Theory of Computation) playlist, you will find all these there. That playlist might also be useful for you if you have subject named FLAT (Formal Language and Automata Theory)

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[@sohammondal9373]

i have unacademy plus subscription but there i got many confusion in 1st and follow...but after watching your video i have a clear idea about 1st and follow

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Your explanation helped me a lot sir. Thank you.

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Sir you really are the best! maine almost saare exams apne aapki vajah se clear kar paye hai!

[@m.asadmemon7387]

if there is ambigouty and left recursion in the grammer so there is no need to remove left rescursion and ambigiouty ?

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I didn't get it I have been confused 😕

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[@nomore_alive9262]

For 5th production, SL' is on RHS, so its frst will be { a , }. so we will right 5 in column of 'a' also?

[@amilmughal786]

You give us short key for understanding the method thank you,🙂

[@sourjadhar9332]

how to remove left recurssion if ll(1)?

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Hey, can you add English subtitles? I would really appreciate it!

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[@deepeshshah4961]

Why are we not considering "a" in the set of Follow(S) ? In production number 2, the string is starting and ending with "a" only... so it should be in Follow(S). Please someone correct me if I am wrong.

[@adizcool2-655]

In follow, we only consider the productions where the non terminal is at right side. Since in S->a, S is not at right side, we do not consider that production for follow. You can check out sir's video on follow. He explains this quite well.

[@devikayannam1642]

Such a good teaching and it is very easy to understand ...thank u sir...😊

[@monikajuneja2778]

Follow of L' ,should be { $ ) }...dollar should also be a follow

[@mohitzen]

I know I'm late but No, Dollar is the follow of start symbols only

[@Skinsk69]

​@@mohitzen Still it helped

[@Skinsk69]

​​​@@mohitzen Do you mean only for S or may be it's not like that and S is just a variable like other

[@take_it_all_so_good]

Now I understood.. Thank you

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Great explanation, thanks!

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[@deekshagupta1752]

Thanku sir , sir I have one doubt that in example when we find follow of L then for this we have to find L' first and L' have two first {€ , } and here we take follow of L w.r.t € but why we don't take follow of L w.r.t comma(,) which is also first of L' ? Plz guide me

[@amanparmar6185]

actullay if we consider the (,) then it will not be LL1 anymore

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Really nice explanation 👍

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[@bhagvatsinhjadeja2892]

follow of L' me ( and $ hoga na? @Gate Smashers

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[@swarajghadage2087]

Check following grammar is LL(1) grammar or not? S->BC|AB, A->aAa| ε, B->bAa, c-> ε Solve it

[@chandanr.m4545]

THANKS🙏🙏

[@sakshidongare7522]

S > aAC | bB A >Abc | Abd | c B >f | g C >h | i So variable A ke first ky rahenge

[@jaytelgote6404]

Yes, in compiler design, defining the FOLLOW() sets for variables (nonterminals) is common. The FOLLOW() sets represent the terminals that can appear immediately after a variable in any derivation. Follow(A) =A A c That`s an exceptional one, I don't think that type of question would ask in an examination pov

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@4:25 you forgot to take second L' for follow🧐

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Best teacher ever

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Thank You sir, this helped a lot !!!

[@MBindu-kc2nj]

Thanks for making it very simple

[@vasusuryavamsham4882]

sir in follow you are taking first in case of L` and taking follow in case of L at 03:25, why

[@atulanuragmishra]

L' ka follow $ bhi hoga

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👍 Thank you sir ........😊

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Thanks sir

[@user-ve1td8ug1e]

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[@devyaniagrawal2808]

Best explanation dete ho sir aap thanku so much

[@Upal_Chattopadhyay]

Sir, can we also say that the 2nd example's production rules itself show that they are neither LLG nor RLG, so can we say that since they are not CGF, automatically they are not LL(1) Grammar?? just curious

[@Ndjdjdgsshshhsjsksksj]

Sir but follow never contains epsilon??

[@ankitaraghuvanshi8410]

Getting all the points ☺

[@vaibhavsharma6663]

the parsing table that you constructed is it a predictive parsing table??

[@jyala123]

Elimination of ambiguous,left recursive, Non deterministic to deterministic grammar Thn we will do LL(1)

[@TYCSE_DivyaYadav]

Thanks for your efforts 🤩

[@user-vh4wc2eh3u]

TOC and compiler design are both same ? Bec NFA and DFA videos are in TOC so.... are they both same!!?

[@hemrajjeure2210]

L's follow m $ bhi ayega na?

[@NazrulIslam-N07n]

Thanks sir

[@kamleshmaurya3599]

sir left recursion type problem ka question banayiye

[@linguafranca7834]

Thank so much!

[@zainmudasir8069]

while considering 1st production, s is producing both ( and a. shouldn't the first production will also be written in a ? please correct me if i am wrong.

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Sir, with your cult fan following and mass explanation, you are soon likely to be worshipped like South Indian heroes (with doodh ka abhishek on 100 ft tall photo cut-outs) . Your humble student and fan :)