---
title: BNNSDataLayout3DFirstMajor
framework: accelerate
role: symbol
role_heading: Global Variable
path: accelerate/bnnsdatalayout3dfirstmajor
---

# BNNSDataLayout3DFirstMajor

A constant that represents a 3D first-major tensor.

## Declaration

```swift
var BNNSDataLayout3DFirstMajor: BNNSDataLayout { get }
```

## Discussion

Discussion The value (i, j, k) is at index k * stride[0] + j * stride[1] + i * stride[2]. size[0] is the size of the first dimension (i). size[1] is the size of the second dimension (j). size[2] is the size of the third dimension (k).

## See Also

### 3D Data Layouts

- [BNNSDataLayoutImageCHW](accelerate/bnnsdatalayoutimagechw.md)
- [BNNSDataLayout3DLastMajor](accelerate/bnnsdatalayout3dlastmajor.md)
- [BNNSDataLayoutSNE](accelerate/bnnsdatalayoutsne.md)
- [BNNSDataLayoutNSE](accelerate/bnnsdatalayoutnse.md)