Cobra Forums

can any one post grammar rules of cobra

Not in the very short term, I can't. This isn't a small task.

Sources for grammar include:
-- http://cobra-language.com/trac/cobra/wiki/AdditionalDoc
-- http://cobra-language.com/docs/manual/
-- The open source code, specifically CobraParser.cobra in the Source\ directory

You can also make some inferences from:
-- http://cobra-language.com/how-to/
-- http://cobra-language.com/samples/

-Chuck