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

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
       atol, atoll - convert a string to a long integer

SYNOPSIS
       #include <stdlib.h>

       long atol(const char *str);
       long long atoll(const char *nptr);

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

	      strtol(str, (char **)NULL, 10)

       The call atoll(str) shall be equivalent to:

	      strtoll(nptr, (char **)NULL, 10)

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

RETURN VALUE
       These functions 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 atol() function is subsumed by strtol() but is retained because it is used extensively
       in  existing  code.  If	the  number  is not known to be in range, strtol() should be used
       because atol() is not required to perform any error checking.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       strtol(), 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 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					 ATOL(3P)
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