labs—long integer absolute value #include <stdlib.h>
long labs(long i);
Description
labs returns
the absolute value of i (also called the magnitude
of i). That is, if i is negative, the result is the opposite
of i, but if i is nonnegative the result is i.
The similar function abs uses and returns int rather than
long values.
Returns
The result is a nonnegative long integer.
Portability
labs is ANSI.
No supporting OS subroutine calls are required.