# Ordinary array data type

An ordinary array data type is a structure that contains an ordered collection of data elements in which each element can be referenced by its ordinal position in the collection.

If N is the cardinality (number of elements) in an array, the ordinal position associated with each element, called the index, is an integer value greater than or equal to 1 and less than or equal to N. All elements in an array have the same data type.