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

SYSNULL

SYSNULL returns the system null pointer value. You can assign SYSNULL to handles and compare it with handles. You can use SYSNULL to initialize static pointer and offset variables.

Read syntax diagramSkip visual syntax diagram>>-SYSNULL--+----+---------------------------------------------><
            '-()-'
 
Note:
NULL and SYSNULL may compare equal; however, you should not write code that depends on their equality.

See also NULL.


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