👤
Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:
Select Section of Man Page:
Select Man Page Repository:

Linux 2.6 - man page for nanl (linux section 3posix)

NAN(P)				    POSIX Programmer's Manual				   NAN(P)

NAME
       nan, nanf, nanl - return quiet NaN

SYNOPSIS
       #include <math.h>

       double nan(const char *tagp);
       float nanf(const char *tagp);
       long double nanl(const char *tagp);

DESCRIPTION
       The function call nan("n-char-sequence") shall be equivalent to:

	      strtod("NAN(n-char-sequence)", (char **) NULL);

       The function call nan("") shall be equivalent to:

	      strtod("NAN()", (char **) NULL)

       If  tagp does not point to an n- char sequence or an empty string, the function call shall
       be equivalent to:

	      strtod("NAN", (char **) NULL)

       Function calls to nanf() and nanl() are equivalent to the corresponding function calls  to
       strtof() and strtold().

RETURN VALUE
       These  functions  shall	return	a quiet NaN, if available, with content indicated through
       tagp.

       If the implementation does not support quiet NaNs, these functions shall return zero.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       strtod() , strtold() , the Base Definitions volume of IEEE Std 1003.1-2001, <math.h>

COPYRIGHT
       Portions of this text are reprinted and	reproduced  in	electronic  form  from	IEEE  Std
       1003.1,	2003  Edition,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					   NAN(P)


All times are GMT -4. The time now is 05:01 PM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
×
UNIX.COM Login
Username:
Password:  
Show Password