ARITH(3) ARITH(3)
NAME
abs, sgn, gcd, lcm, min, max - integer arithmetic functions:
absolute value, sign, greatest common divisor, least common
multiple, minimum, maximum
SYNOPSIS
abs(a)
sgn(a)
gcd(a, b)
long lcm(a, b)
min(a, b)
max(a, b)
DESCRIPTION
Abs returns the absolute value of a.
Sgn returns -1, 0, 1, according as a<0, a=0, a>0.
Gcd returns the largest positive integer that divides both a
and b, except that gcd(0, 0) = 0.
Lcm satisfies
lcm(a, b) = abs(ab/gcd(a, b))
except that lcm(0, 0) = 0.
Min (max) returns the minimum (maximum) of a and b.
SEE ALSO
floor(3) for fabs
DIAGNOSTICS
Abs and gcd return -X, the most negative integer, when the
true result is the unrepresentable value X.
BUGS
The result of lcm is undefined when it doesn't fit in a
long.