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ATOI(3)			   Linux Programmer's Manual		       ATOI(3)

NAME
       atoi, atol, atoll, atoq - convert a string to an	integer.

SYNOPSIS
       #include	<stdlib.h>

       int atoi(const char *nptr);
       long atol(const char *nptr);
       long long atoll(const char *nptr);
       long long atoq(const char *nptr);

DESCRIPTION
       The  atoi() function converts the initial portion of the	string pointed
       to by nptr to int.  The behaviour is the	same as

	      strtol(nptr, (char **)NULL, 10);

       except that atoi() does not detect errors.

       The atol() and atoll() functions	behave the same	as atoi(), except that
       they  convert the initial portion of the	string to their	return type of
       long or long long.  atoq() is an	obsolete name for atoll().

RETURN VALUE
       The converted value.

CONFORMING TO
       SVID 3, POSIX.1,	BSD 4.3, ISO/IEC 9899.	ISO/IEC	 9899:1990  (C89)  and
       POSIX.1	(1996  edition)	 include the functions atoi() and atol() only;
       C99 adds	the function atoll().

NOTES
       The non-standard	atoq() function	is not present in libc 4.6.27 or glibc
       2, but is present in libc5 and libc 4.7 (though only as an inline func-
       tion in <stdlib.h> until	libc 5.4.44).  The atoll() function is present
       in glibc	2 since	version	2.0.2, but not in libc4	or libc5.

SEE ALSO
       atof(3),	strtod(3), strtol(3), strtoul(3)

GNU				  2000-12-17			       ATOI(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | NOTES | SEE ALSO

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