# init(rank:shape:) Creates a shape structure with the specified rank and dimensions. ``` init(rank: Int, shape: UnsafeMutablePointer?) ``` ## Parameters `rank` The rank of the tensor and number of elements in array shape. `shape` Array with a count of [`rank`](/documentation/Accelerate/bnns_graph_shape_t/rank) that contains the sizes of each dimension. --- 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)