[#BloombergLP-balcl-OptionValue-isNull]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balcl.adoc[balcl]::xref:BloombergLP/balcl/OptionValue.adoc[OptionValue]::isNull
:relfileprefix: ../../../
:mrdocs:

Return `true` if the value of this object (irrespective of non&hyphen;`void` type) is null&period; The behavior is undefined unless `true &equals;&equals; hasNonVoidType()`&period;

== Synopsis

Declared in `&lt;balcl&lowbar;optionvalue&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
isNull() const;
----


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