Example: Infinity

public static int main (string[] args) {
// Output: ``inf -- 1 -- false``
double val = double.INFINITY;
print ("%f -- %s -- %s\n", val, val.is_infinity ().to_string (), val.is_finite ().to_string ());
return 0;
}

 valac --pkg glib-2.0 double.INFINITY.vala

See: