Help - Glossary - N - nil
nil is a constant of Smalltalk. It supplements true and false, and supplies a possibility to initiate any variable that is made in Squeak to some Squeak-value. This is nil, and the initiating is done automatically by Squeak in many circumstances.
It does lead to some interesting extensions of truth-value handling in Squeak. See Logic and Squeak.
Glossary - N