PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

NAME

       isprint, isprint_l — test for a printable character

SYNOPSIS

       #include <ctype.h>

       int isprint(int c);
       int isprint_l(int c, locale_t locale);

DESCRIPTION

       For isprint(): The functionality described on this reference page is aligned with the ISO C standard. Any
       conflict between the requirements described here and the ISO C standard is unintentional. This volume  of
       POSIX.1‐2008 defers to the ISO C standard.

       The isprint() and isprint_l() functions shall test whether c is a character of class print in the current
       locale, or in the locale represented  by  locale,  respectively;  see  the  Base  Definitions  volume  of
       POSIX.1‐2008, Chapter 7, Locale.

       The c argument is an int, the value of which the application shall ensure is a character representable as
       an unsigned char or equal to the value of the macro EOF.  If  the  argument  has  any  other  value,  the
       behavior is undefined.

       The  behavior  is  undefined  if  the  locale  argument  to  isprint_l()  is  the  special  locale object
       LC_GLOBAL_LOCALE or is not a valid locale object handle.

RETURN VALUE

       The isprint() and isprint_l() functions shall return non-zero if c is a printable  character;  otherwise,
       they shall return 0.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       To  ensure  applications  portability,  especially across natural languages, only these functions and the
       functions in the  reference  pages  listed  in  the  SEE  ALSO  section  should  be  used  for  character
       classification.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       isalnum(),  isalpha(),  isblank(),  iscntrl(),  isdigit(),  isgraph(),  islower(),  ispunct(), isspace(),
       isupper(), isxdigit(), setlocale(), uselocale()

       The Base Definitions volume of POSIX.1‐2008, Chapter 7, Locale, <ctype.h>, <locale.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers,  Inc
       and  The  Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event
       of any discrepancy between this version and the original IEEE and The Open Group Standard,  the  original
       IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at
       http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have  been  introduced
       during   the   conversion  of  the  source  files  to  man  page  format.  To  report  such  errors,  see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .