[#BloombergLP-bdlt-PosixDateImpUtil-numLeapYears]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/PosixDateImpUtil.adoc[PosixDateImpUtil]::numLeapYears
:relfileprefix: ../../../
:mrdocs:

Return the number of leap years between `year1` and `year2` inclusive.

== Synopsis

Declared in `<bdlt_posixdateimputil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
int
numLeapYears(
    int year1,
    int year2);
----

== Description

Return the number of leap years occurring between the specified `year1` and `year2` (inclusive). The behavior is undefined unless `1 <= year1 <= 9999`, `1 <= year2 <= 9999`, and `year1 <= year2`.

== Return Value

count of leap years in the closed range

== Parameters

[cols="1,4"]
|===
| Name| Description
| *year1*
| inclusive lower bound year
| *year2*
| inclusive upper bound year
|===


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