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STRLEN(3) Library Functions Manual STRLEN(3) NAME strlen, strnlen -- find length of string LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <string.h> size_t strlen(const char *s); size_t strnlen(const char *s, size_t maxlen); DESCRIPTION The strlen() function computes the length of the string s. The strnlen() function attempts to compute the length of s, but never scans beyond the first maxlen bytes of s. RETURN VALUES The strlen() function returns the number of characters that precede the terminating NUL character. The strnlen() function returns either the same result as strlen() or maxlen, whichever is smaller. SEE ALSO string(3), wcslen(3), wcswidth(3) STANDARDS The strlen() function conforms to ISO/IEC 9899:1990 ("ISO C90"). The strnlen() function conforms to IEEE Std 1003.1-2008 ("POSIX.1"). HISTORY The strlen() function first appeared in the Programmer's Workbench (PWB/UNIX) and was ported to Version 7 AT&T UNIX. The strnlen() FreeBSD 13.2 April 3, 2022 STRLEN(3)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS | HISTORY
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