# batchNorm(mean:variance:epsilon:) Adds a batch normalization operation to the current graph. ``` func batchNorm(mean: some BNNSGraph.Builder.OperationParameter, variance: some BNNSGraph.Builder.OperationParameter, epsilon: Float = .ulpOfOne.squareRoot()) -> BNNSGraph.Builder.Tensor ``` ## Parameters `mean` The precomputed mean values. `variance` The precomputed variances. `epsilon` The epsilon value that the function uses to avoid division by zero. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)