ATOL(3)

NAME
atol, atoll - convert ASCII string to long or long long integer

LIBRARY
libc

SYNOPSIS
#include <stdlib.h>
long
atol(const char *nptr);
long long
atoll(const char *nptr);

DESCRIPTION
The atol() function converts the initial portion of the string pointed to by nptr to long integer representation.

It is equivalent to:

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

The atoll() function converts the initial portion of the string pointed to by nptr to long long integer representation.

It is equivalent to:

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

COMPATIBILITY
The FreeBSD implementations of the atol() and atoll() functions are thin wrappers around strtol() and stroll() respectively, so these functions will affect the value of errno in the same way that the strtol() and stroll() functions are able to. This behavior of atol() and atoll() is not required by isoC or isoC-99, but it is allowed by all of isoC, isoC-99 and p1003.1-2001.

ERRORS
The functions atol() and atoll() may affect the value of errno on an error.

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

STANDARDS
The atol() function conforms to isoC. The atoll() function conforms to isoC-99.