---
title: "init(learningRate:momentum:gradientScale:regularizationScale:gradientClipping:usesNesterovMomentum:regularizationFunction:sgdMomentumVariant:)"
framework: accelerate
role: symbol
role_heading: Initializer
path: "accelerate/bnns/sgdmomentumoptimizer/init(learningrate:momentum:gradientscale:regularizationscale:gradientclipping:usesnesterovmomentum:regularizationfunction:sgdmomentumvariant:)"
---

# init(learningRate:momentum:gradientScale:regularizationScale:gradientClipping:usesNesterovMomentum:regularizationFunction:sgdMomentumVariant:)

## Declaration

```swift
init(learningRate: Float, momentum: Float = 0, gradientScale: Float, regularizationScale: Float, gradientClipping: BNNS.GradientClipping, usesNesterovMomentum: Bool = false, regularizationFunction: BNNSOptimizerRegularizationFunction, sgdMomentumVariant: BNNSOptimizerSGDMomentumVariant)
```