Question

BNF notation of do while loop​

Answer 1

Answer:

BNF stand for Backus naur form notation it is a formal method for describing the syntax of programming language which is understood as bakus naur form introduced by John bakus and Peter naur in 1960 BNF may be a meta language ( a language that cannot describe another another language for primary language

Answer 2

Answer:

The answer to the given question is:

<while loop> ::= while ( <condition> ) <statement>

Explanation:

Its name denotes Backus-Naur Form. A formal representation of context-free grammar is written using it. It is also employed to characterize a programming language's syntax.

In essence, BNF notation is merely a form of context-free grammar.

• Context-free grammar can be specified in a formal, mathematical manner. Prior to BNF, people specified programming languages in an imprecise manner, for example, English.

How does BNF appear?

• For example, "number"::= "digit" | "number"::= "digit":= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

• "::=" denotes "is defined as" (in some dialects, ":=" is used instead).

"|" denotes "or,"

• A nonterminal is indicated by angle brackets.

• Terminals are symbols without angle brackets.

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