centos man page for atof

ATOF(3P)						     POSIX Programmer's Manual							  ATOF(3P)

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

NAME
       atof - convert a string to a double-precision number

SYNOPSIS
       #include <stdlib.h>

       double atof(const char *str);

DESCRIPTION
       The call atof(str) shall be equivalent to:

	      strtod(str,(char **)NULL),

       except that the handling of errors may differ. If the value cannot be represented, the behavior is undefined.

RETURN VALUE
       The atof() function shall return the converted value if the value can be represented.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The atof() function is subsumed by strtod() but is retained because it is used extensively in existing code. If the number is not known	to
       be in range, strtod() should be used because atof() is not required to perform any error checking.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

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

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- 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 original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								  ATOF(3P)