1STRLEN(3)                  Linux Programmer's Manual                 STRLEN(3)
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NAME

6       strlen - calculate the length of a string
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SYNOPSIS

9       #include <string.h>
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11       size_t strlen(const char *s);
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DESCRIPTION

14       The strlen() function calculates the length of the string pointed to by
15       s, excluding the terminating null byte ('\0').
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RETURN VALUE

18       The strlen() function returns the number of bytes in the string pointed
19       to by s.
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ATTRIBUTES

22       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
23       tributes(7).
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25       ┌────────────────────────────────────────────┬───────────────┬─────────┐
26       │Interface                                   │ Attribute     │ Value   │
27       ├────────────────────────────────────────────┼───────────────┼─────────┤
28       │strlen()                                    │ Thread safety │ MT-Safe │
29       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

32       POSIX.1-2001, POSIX.1-2008, C89, C99, C11, SVr4, 4.3BSD.
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SEE ALSO

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

38       This page is part of release 5.12 of the Linux  man-pages  project.   A
39       description  of  the project, information about reporting bugs, and the
40       latest    version    of    this    page,    can     be     found     at
41       https://www.kernel.org/doc/man-pages/.
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45GNU                               2021-03-22                         STRLEN(3)
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