[#BloombergLP-bdlb-Float-isQuietNan-08]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/Float.adoc[Float]::isQuietNan
:relfileprefix: ../../../
:mrdocs:

`isQuietNan` overloads

== Synopses

Declared in `<bdlb_float.h>`

Return `true` if `number` is a quiet NaN, and `false` otherwise.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
bool
xref:BloombergLP/bdlb/Float/isQuietNan-07.adoc[isQuietNan](double number);
----

[.small]#xref:BloombergLP/bdlb/Float/isQuietNan-07.adoc[_» more..._]#

Return `true` if the specified floating point `number` has an indeterminate value, and `false` otherwise. An indeterminate floating‐point value ("quiet NaN" or "QNaN") results from an operation for which the result is not mathematically defined, such as multiplying infinity by zero. If a QNaN is used in a subsequent operations the result will also be a QNaN. Note that, because a QNaN is a NaN, if this method returns `true`, then `isNan(x)` will also return `true`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
bool
xref:BloombergLP/bdlb/Float/isQuietNan-06.adoc[isQuietNan](float number);
----

[.small]#xref:BloombergLP/bdlb/Float/isQuietNan-06.adoc[_» more..._]#


[.small]#Created with https://www.mrdocs.com[MrDocs]#