Language - Nonterminal Symbol
1 - About
A non terminal symbol does not appear in the resulting formal language.
They are placeholders for patterns of terminal symbols that can be generated by the nonterminal symbols.
In a context-free grammar, Non terminal symbol appears on the left side of the production.
See also: Language - Terminal (Symbol|Token)
2 - Articles Related
3 - Example
In a the following context free grammar
A -> a A -> b
- The symbol A will never appears in the language.
- The language is composed of
A is then nonterminal symbol.