[#BloombergLP-bdlt-DatetimeInterval-addDaysIfValid]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/DatetimeInterval.adoc[DatetimeInterval]::addDaysIfValid
:relfileprefix: ../../../
:mrdocs:

Add to this time interval the specified number of `days`. Return 0 if the resulting time interval value is valid (i.e., the days field must not overflow an `int`) and a non‐zero value (with no effect) otherwise.

== Synopsis

Declared in `<bdlt_datetimeinterval.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
addDaysIfValid(int days);
----


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