[#BloombergLP-bdlb-Float-isQuietNan-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/Float.adoc[Float]::isQuietNan
:relfileprefix: ../../../
:mrdocs:

Return `true` if `number` is a quiet NaN, and `false` otherwise&period;

== Synopsis

Declared in `&lt;bdlb&lowbar;float&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
bool
isQuietNan(double number);
----


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