# constant(name:value:) Registers and returns a tensor that contains a constant scalar value. ``` func constant(name: String? = nil, value: T) -> BNNSGraph.Builder.Tensor where T : BNNSScalar ``` ## Parameters `name` The name of the tensor. `value` The scalar value that the function copies into the compiled context. ## Discussion For example, the following code defines the tensor `x` that contains the single-precision scalar value `10.0`: ``` let context = try BNNSGraph.makeContext ({ builder in let x = builder.constant(name: "x", value : Float(10)) let y = builder.constant(name: "y", values : [1, 2, 3, 4, 5, 6, 7, 8] as [Float]) let z = x + y return [z] }) var results = [context.allocateTensor(argument: context.argumentNames()[0], fillKnownDynamicShapes: false)!] defer { results[0].deallocate() } try context.executeFunction(arguments: &results) ``` On return, the `results[0]` tensor contains the values `[11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0]`. --- 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)