\
**Category:** Learn\
**Created:** [August 9, 2021, 1:44pm UTC](https://discourse.elm-lang.org/t/model-html-model/7643 "2021-08-09T13:44:15Z")\
**Posts on this page:** 3\
**Page:** 1
**Author:**  [@Zack\_slm](https://discourse.elm-lang.org/u/Zack_slm)\
**Post date:** [August 9, 2021, 1:44pm UTC](https://discourse.elm-lang.org/t/model-html-model/7643/1 "2021-08-09T13:44:15Z")
Hello,
i try to learn ELM and I code program which do this operation :
12 : 1+2+12 = 15
15 : 1+5+15 = 21
i try to add a function to do iteration, for exemple for :
output = 12, iteration = 2
12: 1+2+12 = 15 / 15 : 1+5 + 15 = 21
output =21
I have problem with my view Model → html Model
this is code in ELLIE : [https://ellie-app.com/dXDgf9YgXS3a1](https://ellie-app.com/dXDgf9YgXS3a1)
thank you
---
**Author:**  [@grigorious](https://discourse.elm-lang.org/u/grigorious)\
**Post date:** [August 9, 2021, 2:33pm UTC](https://discourse.elm-lang.org/t/model-html-model/7643/2 "2021-08-09T14:33:25Z")
Hi,
lets go step by step:
the type of your view function is:
```elm
view : Model -> Html Msg
```
This means that it takes a `Model` type as the input and outputs a `Html Msg` type
```elm
I cannot find a `input` variable
```
the compiler is telling you it can’t find input - that is because you did not import it! You have 2 possibilities:
```elm
-- inport the html input element
import Html exposing (Html, button, div, text, input)
```
or
```elm
-- use it strait from the module
Html.input [] []
```
Notice above that `Html.input` is a function that takes 2 arguments, its signature is:
```elm
input : List (Attribute msg) -> List (Html msg) -> Html msg
```
it takes a list of attributes `Attribute msg` and a list of Html nodes `Html msg`, notice that the `msg` starts with a small letter - this means that it could be anything - any message!
You are also using `placeholder`, `id` attributes without importing them, I would suggest you use `Attr.placeholder` since you did this at the top:
```elm
import Html.Attributes as Attr
```
From the code I suggest you go thru the [elm guide](https://guide.elm-lang.org) and also open the main packages like:
[core](https://package.elm-lang.org/packages/elm/core/latest/)
[html](https://package.elm-lang.org/packages/elm/html/latest/)
[json](https://package.elm-lang.org/packages/elm/json/latest/)
…
---
**Author:**  [@system](https://discourse.elm-lang.org/u/system)\
**Post date:** [August 19, 2021, 2:33pm UTC](https://discourse.elm-lang.org/t/model-html-model/7643/3 "2021-08-19T14:33:43Z")
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