num
static final double INFINITY = 1.0 / 0.0;
static final double NAN = 0.0 / 0.0;
static final double NEGATIVE_INFINITY = -INFINITY;
double abs();
double ceil();
double floor();
double operator *(num other);
double operator ~/(num other);
double operator /(num other);
double operator negate();
double operator -(num other);
double operator %(num other);
double operator +(num other);
double remainder(num other);
double round();
double truncate();