# constant(values:rowMajor:) Returns a rank 2 tensor from an array of arrays. ``` func constant(values: Array>, rowMajor: Bool = false) -> BNNSGraph.Builder.Tensor ``` ## Discussion> Precondition: Each sub-array must contain the same number of elements. The following code shows how to use this function to multiply two 2x2 matrices: ``` let xValues = [[1, 2], [3, 4]] as [[Float]] let yValues = [[5, 6], [7, 8]] as [[Float]] let context = try BNNSGraph.makeContext { builder in let x = builder.constant(values: xValues) let y = builder.constant(values: yValues) let z = x.matmul(other: y) return [z] // On return, `z` equals `[19.0, 22.0, 43.0, 50.0]`. } ``` --- 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)