---
title: "subscript(_:)"
framework: coreml
role: symbol
role_heading: Instance Subscript
path: "coreml/mlmultiarray/subscript(_:)-2hh91"
---

# subscript(_:)

Accesses the multiarray by using a linear offset.

## Declaration

```swift
subscript(idx: Int) -> NSNumber { get set }
```

## Parameters

- `idx`: A linear offset index that represents a position the multiarray.

## Return Value

Return Value A number.

## Discussion

Discussion Use the subscript to linearly index a one-dimensional multiarray in the same way as a conventional array. let oneDimensionalArray = try MLMultiArray(shape: [42], dataType: .int32) let numberValue = oneDimensionalArray[7] Multiarrays with more than one dimension order their elements in row-major order. In these cases, calculate a linear offset by summing the products of each dimension’s index with the dimension’s stride (See strides). let multiArray = try MLMultiArray(shape: [5, 22, 17], dataType: .double)

let dimension0 = 3 let dimension1 = 5 let dimension2 = 7

var linearIndex = 0 linearIndex += dimension0 * multiArray.strides[0].intValue linearIndex += dimension1 * multiArray.strides[1].intValue linearIndex += dimension2 * multiArray.strides[2].intValue

let previousNumberValue = multiArray[linearIndex] multiArray[linearIndex] = 2.718_28