> > > We can’t perform arithmetic on an Option<int> any more than we could on a List<int>. Is actually kind of a weird point to make. There are number of ways

> > > We can’t perform arithmetic on an Option<int> any more than we could on a List<int>. Is actually kind of a weird point to make. There are number of ways to add together List<int> including: listA.zip(listB).map(([a, b]) => a + b); Similarly adding together two optionals could be done with: optionalA.zip(optionalB).map(([a, b]) => a + b); Or if you would rather: optionalA .zip(optionalB) .map(([a, b]) => a + b) .or(optionalA) .or(optionalB)