Question

explain about non terminal numbers

Answer 1

Nonterminal symbols are those symbols which can be replaced. ... Context-free grammars are those grammars in which the left-hand side of each production rule consists of only a single nonterminal symbol. This restriction is non-trivial; not all languages can be generated by context-free grammars.

Answer 2

here is your answer


nonterminal symbols are the lexical elements used in specifying the production rules constituting a formal grammar.


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