[#bsl-basic_string-0faf-find_last_not_of-024]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0faf.adoc[basic_string]::find_last_not_of
:relfileprefix: ../../
:mrdocs:

Return the position of the last character in this string that is not found in the specified `characterString`, or `npos` if not found.

== Synopsis

Declared in `<bslstl_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_string-0faf/size_type.adoc[size_type]
find_last_not_of(
    CHAR_TYPE const* characterString,
    xref:bsl/basic_string-0faf/size_type.adoc[size_type] position = npos) const;
----

== Return Value

position of the last non‐matching character, or `npos`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *characterString*
| pointer to characters
| *position*
| starting index
|===


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