[#BloombergLP-bbldc-DateRangeDayCount-daysDiff]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bbldc.adoc[bbldc]::xref:BloombergLP/bbldc/DateRangeDayCount.adoc[DateRangeDayCount]::daysDiff
:relfileprefix: ../../../
:mrdocs:

Return the (signed) number of days between the specified `beginDate` and `endDate`. If `beginDate <= endDate`, then the result is non‐negative. The behavior is undefined unless `firstDate() <= beginDate <= lastDate()` and `firstDate() <= endDate <= lastDate()`. Note that reversing the order of `beginDate` and `endDate` negates the result.

== Synopsis

Declared in `<bbldc_daterangedaycount.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
int
daysDiff(
    xref:BloombergLP/bdlt/Date.adoc[bdlt::Date] const& beginDate,
    xref:BloombergLP/bdlt/Date.adoc[bdlt::Date] const& endDate) const = 0;
----


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