STRLEN(3) Linux Programmer's Manual STRLEN(3)
NAME
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 (' ').
RETURN VALUE
The strlen() function returns the number of characters 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
string(3), strnlen(3), wcslen(3), wcsnlen(3)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
GNU 2016-03-15 STRLEN(3)