name: composed of letters, numbers, and underscores, starts with a letter.
           By convention, a variable name uses only letters in the lower case.
           The name of a variable is a noun that describes the meaning of the variable.

type: name of a class,
         composed of letters, numbers, and underscores, starts with a letter.
         By convention, a class (type) name uses only letters in the upper case.
         The name of a class is a noun that describes the meaning of the class.
         The basic types in Eiffel are INTEGER, REAL, DOUBLE, CHARACTER, BOOLEAN.

value: the value of the variable
           A numeric variable is given an initial value of zero.
           The value of a variable is changed by assignment.