Block Expressions

Generated Markdown for references/concept_block_expressions.md.

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# Block Expressions

_A { ... } expression holds let bindings followed by a tail expression, which is the block's value._

A `{ ... }` expression holds zero or more `let ... ;` bindings followed by a tail expression, which is the block's value.

```wcl
result = {
  let a = to_upper("x");
  let b = to_upper("y");
  len(a) + len(b)
}
```

## Related

- [let bindings](../references/concept_let_bindings.md)

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