PLI: How to Declare Arrays

An array is a subscripted collection of data items of the same data type.

PL/I allows arrays of arithmetic values, character strings, bit strings, label constants, entry constants, pointers, files, or structures. You can refer more in it.

The following are examples of array declarations:

declare  test_scores(100);
declare A(4,5);
declare A( 1:4, 2:5, 0: 10);

You make direct references to individual elements of an array by using a subscripted variable reference.

PL/I also allows you to make cross-sectional references, with the restriction that the reference must specify a data component whose storage is connected.

For example, using the following declarations,

declare A(5,2) fixed binary; 
declare B(5,2) fixed binary;

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