[#BloombergLP-bbldc-PeriodDayCountUtil-yearsDiff-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bbldc.adoc[bbldc]::xref:BloombergLP/bbldc/PeriodDayCountUtil.adoc[PeriodDayCountUtil]::yearsDiff
:relfileprefix: ../../../
:mrdocs:

See the corresponding `bsl::vector` overload above.

== Synopsis

Declared in `<bbldc_perioddaycountutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
double
yearsDiff(
    xref:BloombergLP/bdlt/Date.adoc[bdlt::Date] const& beginDate,
    xref:BloombergLP/bdlt/Date.adoc[bdlt::Date] const& endDate,
    std::vector<bdlt::Date> const& periodDate,
    double periodYearDiff,
    xref:BloombergLP/bbldc/DayCountConvention/Enum.adoc[DayCountConvention::Enum] convention);
----

== Return Value

signed fractional year difference according to `convention`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *beginDate*
| start of the date range
| *endDate*
| end of the date range
| *periodDate*
| sorted unique period‐boundary dates
| *periodYearDiff*
| year fraction of each period
| *convention*
| day‐count convention to apply
|===


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