# Match Expression

A `match` expression compares a target value against patterns from top to bottom and selects the first matching arm.

```dcdl
foo = match inputs.a.hoge {
    >= 20: {
        value = 200;
    };
    >= 10: {
        value = 100;
    };
    _: {
        value = 300;
    };
};
```

`_` is the fallback pattern.

## Ordering

Arms are ordered; Decodal does not automatically select the most specific pattern.
If a broad condition appears first, narrower conditions after it are unreachable.