<pre><code class="lang-fsharp">let arraySign (nums: int list) : int =
    if List.exists ((=) 0) nums then
        0
    else
        let negatives =
            nums |&gt; List.filter ((&gt;) 0) |&gt; List.length

        if negatives % 2 = 0 then 1 else -1
</code></pre>


```fsharp
let arraySign (nums: int list) : int =
    if List.exists ((=) 0) nums then
        0
    else
        let negatives =
            nums |> List.filter ((>) 0) |> List.length

        if negatives % 2 = 0 then 1 else -1
```

LeetCode 1822. Sign of the Product of an Array in F#