Section 4.4.3 asks for two things. The first is to check whether a string is syntactically valid by referring to BNF or to a syntax diagram. The second is to explain why BNF can represent languages ...
To make repeats easier you will often find that an extended BNF notation is used where curly brackets are used to indicate that the item can occur as many times as you like – including zero. In this ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results