[#BloombergLP-bsls-TimeInterval-operator_plus_eq-054]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsls.adoc[bsls]::xref:BloombergLP/bsls/TimeInterval.adoc[TimeInterval]::operator&plus;&equals;
:relfileprefix: ../../../
:mrdocs:

Add a real number of seconds to this time interval&period;

== Synopsis

Declared in `&lt;bsls&lowbar;timeinterval&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bsls/TimeInterval.adoc[TimeInterval]&
operator&plus;&equals;(double rhs);
----

== Description

Add to this time interval the value of the specified `rhs` real number of seconds, and return a reference providing modifiable access to this object&period; The fractional part of `rhs`, if any, is rounded to the nearest whole number of nanoseconds before being added to this object&period; The behavior is undefined unless `rhs` can be converted to a valid `TimeInterval` object, and the total number of seconds in the resulting time interval can be represented with a 64&hyphen;bit signed integer&period;

== Return Value

a reference providing modifiable access to this object

== Parameters

[cols="1,4"]
|===
| Name| Description
| *rhs*
| right&hyphen;hand seconds as `double`
|===


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