To discuss the actual procedure let consider a grammar.
This grammar has null production because λ is not part of the language.
Removal λ – production:
Step1: To remove λ – production first we generate nullable variable from grammar.
Nullable variable = {B, C, A} Either the same production directly indirectly produces λ.
Step 2:
Now we write production from which we do not get λ. Rewrite the production as
So, after rewrite the grammar final grammar is
Then we should add some extra production due to the removal of λ