# executeFunction(_:arguments:) Executes the specified function using an array of input and output pointers. ``` func executeFunction(_ function: String? = nil, arguments: [T]) throws where T : BNNSGraph.PointerArgument ``` ## Parameters `function` The function. Specify as `nil` if the graph only contains one function. `arguments` The output and input arguments. Note that the arguments may not be in the same order as the original `mlpackage` or `mlmodelc` file. Use the [`argumentPosition(forFunction:argument:)`](/documentation/Accelerate/BNNSGraph/Context/argumentPosition(forFunction:argument:)) function to get the correct position in the `arguments` array for a given argument. --- 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)