sir acc to the explanation in rule 3 why we can't mention First(c) also contain null then First(A) ={b, c, null}. but an early explanation of rule 3 the set contain also null later mentions it contains null if both A and B contain null .confused please explain dear sir thanks .
We are trying to find all the possible terminals in the strings derived from A, where A -> BC ,and B and C end in some terminals. Now suppose that B turns out to be null, then the start for A will simply be the starting symbol for C, so in this case, the starting symbol for A just can not be null, since there is always starting symbol of C to show up if B turns out to be null, and ofc, if B is not null then A's start symbol will simply be B's start symbol, so we need not include null in A's start. But now consider the case in which both B and C are nullable, if both of them simultaneously become null then the value of A's start will be null, hence in this case we need to include null in start
I must say your teaching skills are much better than others❤❤😊
Most underrated video love you sir ❤❤
Best video on first and follow ❤️
Fabulous video sir app na hote toh bhut difficult hota yeh sab
Best explanation ever
amazing content
God level content
VIDLIIIII 23 minn.. leftttt aaaahhhh
thankyou so much sir
sir acc to the explanation in rule 3 why we can't mention First(c) also contain null then First(A) ={b, c, null}. but an early explanation of rule 3 the set contain also null later mentions it contains null if both A and B contain null .confused please explain dear sir thanks .
We are trying to find all the possible terminals in the strings derived from A, where A -> BC ,and B and C end in some terminals. Now suppose that B turns out to be null, then the start for A will simply be the starting symbol for C, so in this case, the starting symbol for A just can not be null, since there is always starting symbol of C to show up if B turns out to be null, and ofc, if B is not null then A's start symbol will simply be B's start symbol, so we need not include null in A's start. But now consider the case in which both B and C are nullable, if both of them simultaneously become null then the value of A's start will be null, hence in this case we need to include null in start
thanks sir
👍👍