code block

<!-- wp:core/code {
    "language": "haskell",
    "indent": [ "\t", 1 ]
} -->
<code><pre>
sum :: Foldable t, Num a => t a -> a
sum = foldl (+) 0
</pre></code>
<!-- /wp:core/code -->

sum :: Foldable t, Num a => t a -> a
sum = foldl (+) 0