Go to Inflex.

- Hit
`Formula`

. - In the formula box, type
`[1,2,3].`

and then type`sum`

and hit Enter when it pops up. - Type
`()`

so that you see`[1,2,3].sum()`

. - Hit enter. You should see
`#ok 6`

. - Click the triangle at the top left of the cell to edit the formula.
- At the end, add
`.from_ok(0)`

(remember to hit Enter when`from_ok`

pops up). - You should see simply
`6`

.

You now know how to unwrap the `#ok`

variant in Inflex.