Question

Given a backus naur form , identify all the valid code samples'?

Answer 1

Valid code samples can be identified by checking if they match the syntax specified by the Backus-Naur Form (BNF). BNF is a notation used to formally describe the grammar of a programming language or other formal language.

Step-by-step explanation:

Given a Backus-Naur Form (BNF), valid code samples can be identified by checking if they match the syntax specified by the BNF. BNF is a notation used to formally describe the grammar of a programming language or other formal language. It consists of production rules that define how valid code can be constructed.For example, if a BNF specifies that a valid code sample consists of an identifier followed by an equal sign and a number, any code sample that follows this pattern will be considered valid. On the other hand, a code sample that does not match the BNF's syntax will be considered invalid.

1. variable = 10: This code sample matches the BNF's syntax of an identifier followed by an equal sign and a number.
2. if(condition) { code }: This code sample does not match the BNF's syntax as it does not follow the specified pattern.
3. int x;: This code sample matches the BNF's syntax for declaring an integer variable.