dhall-1.3.0: Prelude/Natural/product

{-
Multiply all the numbers in a `List`

Examples:

```
./product ([+2, +3, +5] : List Natural) = +30

./product ([] : List Natural) = +1
```
-}
let product : List Natural → Natural
    =   λ(xs : List Natural)
    →   List/fold Natural xs Natural (λ(l : Natural) → λ(r : Natural) → l * r) +1

in  product