---
title: vDouble
framework: Kernel
role: symbol
role_heading: Type Alias
platforms: [iOS 7.0+, iPadOS 7.0+, Mac Catalyst 13.0+, macOS 10.12+, tvOS 9.0+, visionOS 1.0+, watchOS 4.0+]
path: kernel/vdouble
---

# vDouble

## Declaration

```occ
typedef __attribute__((__vector_size__(2 * sizeof(double)))) double vDouble;
```