5.22.7 IS

The IS command is used to check if the return parameter is a NULL reference. If the condition check is true then an OK status is returned or a status of NO is returned.

Syntax:

Command

Keyword

Value

Developer notes for Command/Keyword/Value

IS

NULL

*RETURN

Conditional.

NOT_NULL

*RETURN

Conditional.

 

 

Example

 

IS NULL(*RETURN)

IS NOT_NULL(*RETURN)