[#bsl-Deque_Base-at-08]
= xref:bsl.adoc[bsl]::xref:bsl/Deque_Base.adoc[Deque_Base]::at
:relfileprefix: ../../
:mrdocs:

Return a non‐modifiable reference to the element at `position`.

== Synopsis

Declared in `<bslstl_deque.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/Deque_Base/const_reference.adoc[Deque_Base<VALUE_TYPE>::const_reference]
at(xref:bsl/Deque_Base/size_type.adoc[size_type] position) const;
----

== Description

Return a reference providing non‐modifiable access to the element at the specified `position` in this deque. Throw a `std::out_of_range` exception if `position >= size()`.

== Return Value

non‐modifiable reference to the element at `position`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *position*
| zero‐based index of the element
|===


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