Function group | Execute on client | Platform(s) |
---|---|---|
General | YES | All |
isnull(expression)
Returns true if the expression has value NULL.
Also returns true if fieldname, a field in the current record, is null. A null value is one where no value has been entered and the field definition is Can be null without Insert as Empty.
Calculate lVar1 as #NULL
Calculate lBoolean as isnull(lVar1)
# returns true because lVar1 is null