Manpages - strlen.3
Table of Contents
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.
NOTES
In cases where the input buffer may not contain a terminating null byte, *strnlen*(3) should be used instead.
SEE ALSO
*string*(3), *strnlen*(3), *wcslen*(3), *wcsnlen*(3)
COLOPHON
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