Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.9, Language Reference Manual

PRESENT

PRESENT(x) returns a BIT(1) value that is '1'B if the parameter x was present in the invocation of its containing procedure.

Read syntax diagramSkip visual syntax diagram>>-PRESENT(x)--------------------------------------------------><
 
x
Level-1 unsubscripted BYADDR parameter.
Note:
This argument must be declared as OPTIONAL in the corresponding ENTRY declaration in the calling code.

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