### 6.23 `wcsrchr`—wide-character string scanning operation

Synopsis

         #include <wchar.h>
         wchar_t *wcsrchr(const wchar_t *s, wchar_t c);

Description
The `wcsrchr` function locates the last occurrence of c in the wide-character string pointed to by s. The value of c must be a character representable as a type wchar_t and must be a wide-character code corresponding to a valid character in the current locale. The terminating null wide-character code is considered to be part of the wide-character string.

Returns
Upon successful completion, `wcsrchr` returns a pointer to the wide-character code or a null pointer if c does not occur in the wide-character string.

Portability
`wcsrchr` is ISO/IEC 9899/AMD1:1995 (ISO C).

No supporting OS subroutines are required.