[#bsl-basic_string-0f3-find_last_not_of-0fd]
= xref:bsl.adoc[bsl]::xref:bsl/basic_string-0f3.adoc[basic_string<char32_t>]::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-0f3/size_type.adoc[size_type]
find_last_not_of(
    char32_t const* characterString,
    xref:bsl/basic_string-0f3/size_type.adoc[size_type] position = npos) const;
----


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