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 ('\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

       string(3), strnlen(3), wcslen(3), wcsnlen(3)

COLOPHON

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       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at https://www.kernel.org/doc/man-pages/.