NAME
abs(), labs() — return integer absolute value
SYNOPSIS
#include <stdlib.h>
int abs(int i);
long int labs(long int i);
DESCRIPTION
abs()
returns the absolute value of its integer operand.
labs()
is similar to
abs(),
except that the argument and the returned value
each have type
long int.
The largest negative integer returns itself.
APPLICATION USAGE
The interfaces
abs()
and
labs()
are thread-safe and async-cancel-safe.
WARNINGS
In two's-complement representation,
the absolute value of the negative integer
with largest magnitude is undefined.
Some implementations trap this error,
but others simply ignore it.
STANDARDS CONFORMANCE
abs(): AES, SVID2, SVID3, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1, ANSI C
labs(): AES, SVID3, XPG4, ANSI C
Printable version
