About BNF grammar

I'm currently learning BNF grammar and here is the question:

Modify the following BNF that can be used to process these two strings:

float myVar =5*4.3+2.1 or float mynum= 3.4+7*2.1

Here is my process now:

Exp->??=math

?? -> key + id

math-> multi + multi

multi-> int * multi | float | multi * int

What should I name for the ?? part

Is there a specific name for it?

https://stackoverflow.com/questions/66486178/about-bnf-grammar March 05, 2021 at 11:04AM