IsNull
The IsNull() function assesses whether an element has no value assigned to it (has a Null value).
Related functions: IsDate, IsDefined, IsElement
Syntax
IsNull (Element)
| Element | Any parameter, with or without a value assigned to it |
Note:
If the element does not exist, or an error is returned when interrogating the value of the element, the IsNull() function returns FALSE.
Examples
| Parameter | Function | Output |
| Element = 1 | IsNull(Element) | FALSE |
| Element = “ABC” | IsNull(Element) | FALSE |
| Element = NULL | IsNull(Element) | TRUE |