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When you define a class, you tell Smalltalk about instance variables, which are variables that describe the instances of the class.
Thus, in the following diagram, the Vegetable class description
contains instance variable names, whereas the descriptions of
particular Vegetable instances contain instance variable values.
*----------------------------------------* | Names of variables: | <-- Description of | fCalories | Vegetable | cCalories | class | pCalories | *----------------------------------------* | | | Instance | Instance v v *---------------------* *---------------------* | fCalories 3 | | fCalories 0 | <-- Descriptions of | cCalories 16 | | cCalories 23 | Vegetable | pCalories 9 | | pCalories 4 | instances *---------------------* *---------------------*