IS-PARAMETER-SET attribute
Indicates whether you have already set a particular parameter.
Data type: LOGICAL
Access: Read-only
Syntax
IS-PARAMETER-SET ( parameter-number )
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parameter-number
An integer expression indicating the order of the parameter, where 1 represents the first parameter, 2 represents the second parameter, and so on.
If the parameter is set, IS-PARAMETER-SET returns TRUE. Otherwise, it returns FALSE. The default is FALSE.