[#BloombergLP-bslfmt-basic_format_context-arg-02]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslfmt.adoc[bslfmt]::xref:BloombergLP/bslfmt/basic_format_context.adoc[basic_format_context]::arg
:relfileprefix: ../../../
:mrdocs:

Return the formatting argument at zero‐based index `id`.

== Synopsis

Declared in `<bslfmt_format_context.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bslfmt/basic_format_context.adoc[basic_format_context<t_OUT, t_CHAR>::Arg]
arg(size_t id) const noexcept;
----

== Description

If `id` is not less than the number of contained arguments, a default‐constructed `basic_format_arg` object is returned.

== Return Value

the argument at position `id`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *id*
| zero‐based argument index
|===


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