Answer:
The answer of the given question is:
<S> ::= A <S> | <empty>
Step-by-step explanation:
BNF (Backus-Naur notation) is the formal mathematical ways to describe the language.
It consists the following ways:
- set of the terminal symbol.
- set of the non-terminal symbol.
- set of production rule of form.
Syntax:
Left-Hand-Side ::= Right-Hand-Side