---
title: BNNS.PoolingType.l2Norm
framework: accelerate
role: symbol
role_heading: Case
path: accelerate/bnns/poolingtype/l2norm
---

# BNNS.PoolingType.l2Norm

A function for pooling that computes the square root of the sum of squares of each element in the pooling kernel.

## Declaration

```swift
case l2Norm
```

## See Also

### Pooling Types

- [BNNS.PoolingType.average(countIncludesPadding:)](accelerate/bnns/poolingtype/average(countincludespadding:).md)
- [BNNS.PoolingType.max(indices:xDilationStride:yDilationStride:)](accelerate/bnns/poolingtype/max(indices:xdilationstride:ydilationstride:).md)
- [BNNS.PoolingType.unMax(indices:xDilationStride:yDilationStride:)](accelerate/bnns/poolingtype/unmax(indices:xdilationstride:ydilationstride:).md)