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# functionalName

The name of the functional operation this definition implements.

```
var functionalName: String { get }
```

## Discussion

Unlike [`name`](/documentation/RealityKit/ShaderGraph/NodeDefinition/name), the functional name omits type information and is shared
by all definitions that implement the same operation across different types.
For example, `ND_atan2_float` and `ND_atan2_vector2` both have the
functional name `"atan2"`.

Use this value with [`definitions(function:inputs:)`](/documentation/RealityKit/ShaderGraph/NodeLibrary/definitions(function:inputs:))
to find all type variants of an operation.

---

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