---
title: beta
framework: accelerate
role: symbol
role_heading: Instance Property
path: accelerate/bnnslayerparameterstensorcontraction/beta
---

# beta

A value, that must be either 0.0 or 1.0, you use to scale the existing output before the operation adds it to the result.

## Declaration

```swift
var beta: Float
```

## See Also

### Instance Properties

- [operation](accelerate/bnnslayerparameterstensorcontraction/operation.md)
- [alpha](accelerate/bnnslayerparameterstensorcontraction/alpha.md)
- [iA_desc](accelerate/bnnslayerparameterstensorcontraction/ia_desc.md)
- [iB_desc](accelerate/bnnslayerparameterstensorcontraction/ib_desc.md)
- [o_desc](accelerate/bnnslayerparameterstensorcontraction/o_desc.md)