strlen — calculate the length of a string
Synopsis
#include <string.h> size_t strlen(const char *s);
Description
The strlen() function calculates the length of the string pointed to by s, excluding the terminating null byte ('\0').
Return Value
The strlen() function returns the number of bytes in the string pointed to by s.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
|---|---|---|
| strlen() | Thread safety | MT-Safe |
Conforming to
POSIX.1-2001, POSIX.1-2008, C89, C99, C11, SVr4, 4.3BSD.
See Also
Colophon
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Referenced By
lber-types(3), regex(3), signal-safety(7), strchr(3), str_copy(3), str_diff(3), str_diffn(3), str_equal(3), string(3), str_len(3), strnlen(3), waffle_error(3), wcslen(3).