[#BloombergLP-bdlb-NullableValue-isNull] = xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/NullableValue.adoc[NullableValue]::isNull :relfileprefix: ../../../ :mrdocs: Return `true` if this object is null, and `false` otherwise. == Synopsis Declared in `<bdlb_nullablevalue.h>` [source,cpp,subs="verbatim,replacements,macros,-callouts"] ---- bool isNull() const noexcept; ---- [.small]#Created with https://www.mrdocs.com[MrDocs]#