[#bsl-basic_string-0faf-append-06]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0faf.adoc[basic_string]::append
:relfileprefix: ../../
:mrdocs:

Append a substring of `suffix` to this string.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_string-0faf.adoc[basic_string]&
append(
    xref:bsl/basic_string-0faf.adoc[basic_string] const& suffix,
    xref:bsl/basic_string-0faf/size_type.adoc[size_type] position,
    xref:bsl/basic_string-0faf/size_type.adoc[size_type] numChars = npos);
----

== Description

Append to this string the optionally specified `numChars` characters starting at the specified `position` in the specified `suffix`, or the tail of `suffix` starting at `position` if `position + numChars > suffix.length()`. If `numChars` is not specified, `npos` is used. Return a reference providing modifiable access to this string. Throw `out_of_range` if `position > suffix.length()`.

== Return Value

a reference to this string

== Parameters

[cols="1,4"]
|===
| Name| Description
| *suffix*
| string providing the characters to append
| *position*
| starting index in `suffix`
| *numChars*
| number of characters to append
|===


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