ATOL(3) Library Functions Manual ATOL(3)
NAME
atolconvert ASCII string to long integer
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
long
atol(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);
SEE ALSO
STANDARDS
The atol() function conforms to ANSI X3.159-1989 (“ANSI C”).