---
title: BNNS.DescriptorType.parameter
framework: accelerate
role: symbol
role_heading: Case
path: accelerate/bnns/descriptortype/parameter
---

# BNNS.DescriptorType.parameter

A parameter that’s trainable, such as weights or bias.

## Declaration

```swift
case parameter
```

## See Also

### Descriptor Types

- [BNNS.DescriptorType.constant](accelerate/bnns/descriptortype/constant.md)
- [BNNS.DescriptorType.sample](accelerate/bnns/descriptortype/sample.md)