[#bsl-vectorBase-0b2-data-0dc]
= xref:bsl.adoc[bsl]::xref:bsl/vectorBase-0b2.adoc[vectorBase&lt;long&gt;]::data
:relfileprefix: ../../
:mrdocs:

Return the address of the modifiable first element in this vector, or a valid, but non&hyphen;dereferenceable pointer value if this vector is empty&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;vector&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
long*
data() noexcept;
----


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