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

# BNNS.DescriptorType.constant

A constant that doesn’t have a gradient.

## Declaration

```swift
case constant
```

## See Also

### Descriptor Types

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