WCSLENSection: Linux Programmer's Manual (3)
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NAMEwcslen - determine the length of a wide-character string
#include <wchar.h> size_t wcslen(const wchar_t *s);
DESCRIPTIONThe wcslen() function is the wide-character equivalent of the strlen(3) function. It determines the length of the wide-character string pointed to by s, not including the terminating L'\0' character.
RETURN VALUEThe wcslen() function returns the number of wide characters in s.
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.