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.\"     @(#)atol.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: src/lib/libc/stdlib/atol.3,v 1.13 2002/01/09 14:03:54 ru Exp $
.\"
.Dd November 28, 2001
.Dt ATOL 3
.Os
.Sh NAME
.Nm atol , atoll
.Nd convert
.Tn ASCII
string to
.Vt long
or
.Vt "long long"
integer
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdlib.h
.Ft long
.Fn atol "const char *nptr"
.Ft "long long"
.Fn atoll "const char *nptr"
.Sh DESCRIPTION
The
.Fn atol
function converts the initial portion of the string pointed to by
.Fa nptr
to
.Vt long
integer
representation.
.Pp
It is equivalent to:
.Pp
.Dl "strtol(nptr, (char **)NULL, 10);"
.Pp
The
.Fn atoll
function converts the initial portion of the string pointed to by
.Fa nptr
to
.Vt "long long"
integer
representation.
.Pp
It is equivalent to:
.Pp
.Dl "strtoll(nptr, (char **)NULL, 10);"
.Sh ERRORS
The functions
.Fn atol
and
.Fn atoll
need not
affect the value of
.Va errno
on an error.
.Sh SEE ALSO
.Xr atof 3 ,
.Xr atoi 3 ,
.Xr strtod 3 ,
.Xr strtol 3 ,
.Xr strtoul 3
.Sh STANDARDS
The
.Fn atol
function
conforms to
.St -isoC .
The
.Fn atoll
function
conforms to
.St -isoC-99 .