Collection Datatypes:

A collection is an ordered group of elements where all of the similar type. Every element has a unique subscript which determines the position of the collection. We shall see more about collections in another chapter.

Boolean Datatypes:

Boolean Datatypes represents Logical values TRUE/ FALSE/ NULL can be stored using the BOOLEAN datatype. That datatype has no parameters.

Exception Datatype:

This is a datatype which can used to define exception or error-handlers that is defined via the user. This is described in the chapter on Exceptions.