Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Language Reference Manual

Data items

Variables
Constants
Using quotation marks
Punctuating constants

A data item is either the value of a variable or a constant. (These terms are not exactly the same as in general mathematical usage. They are discussed further in the next section.) Data items can be single items, called scalars, or they can be a collection of items called data aggregates.

Data aggregates are groups of data items that can be referred to either collectively or individually. The kinds of data aggregates are arrays, structures, and unions. You can use any type of computational or program-control data to form a data aggregate.

Arrays are discussed in Arrays, structures in Structures, unions in Unions, and arrays of structures and unions starting in Combinations of arrays, structures, and unions.


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