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)