[#BloombergLP-bdldfp-DecimalImpUtil-epsilon64]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdldfp.adoc[bdldfp]::xref:BloombergLP/bdldfp/DecimalImpUtil.adoc[DecimalImpUtil]::epsilon64
:relfileprefix: ../../../
:mrdocs:

Return the difference between the least representable value of type `ValueType64` greater than 1 and 1 (IEEE‐754: +1e‐15).

== Synopsis

Declared in `<bdldfp_decimalimputil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
xref:BloombergLP/bdldfp/DecimalImpUtil/ValueType64.adoc[ValueType64]
epsilon64() noexcept;
----


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