I'm pretty new to CFG, and I've tried out some samples as well. As of now I'm trying this for-loop to write it in CFG using BNF:Start{    int z = 20;    for(int b = 0; b < 5; b++)      {        //some statement    }}Attempted BNF:<program> ::= Start <blockstatements><blockstatements> ::= <statement> | <statement>; | <statement_list> | <empty><statement> ::= <typespecification> <varDeclaration> <assignment-operator> <expression> <typespecification> ::= char | short | int | long | float | double | string<varDeclaration> ::= a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | x | y | z<assignment-operator> ::= =<expression> ::= <value> <value> ::= <digit> | <letter> | <number> | <word> <digit> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9<letter> ::= A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S |             T | U | V | W | X | Y | Z | a | b | c | d | e | f | g | h | i | j | k | l |             m | n | o | p | q | r | s | t | u | v | w | x | y | z<number> ::= <digit> + <digit> | <digit> - <digit> | <digit> * <digit> | <digit> / <digit>The above CFG isn't complete and I wanted to make sure that I'm doing it correctly. Am I heading towards the right path? Should it be written as above or have I missed anything?Any help could be appreciated.
Writing a Context-Free-Grammar using Backus Naur Form for a for-loop?
formal languages;context free;formal grammars;attribute grammars
I've usually seen it expressed as something like:forExpression ::= for ( <declExpression> <expression>; <expression> ) <blockStatement>blockStatement ::= <statement> |  { <statementlist> }statement ::= <declExpression> | <forExpression> | <ifExpression> | ...<declExpression> includes the semi colon You want to be very careful of the details like where you define where things like the semi colon are required, In your <number> you don't have any priorities set up, there is also no option for parenthesis, ... Creating a good CFG is hard which is why so many languages start out as a dialect of C and just take that grammar and adapt it.