---
title: diameter
framework: vision
role: symbol
role_heading: Instance Property
path: vision/vncircle/diameter
---

# diameter

The circle’s diameter.

## Declaration

```swift
var diameter: Double { get }
```

## See Also

### Inspecting a Circle

- [center](vision/vncircle/center.md)
- [radius](vision/vncircle/radius.md)
- [contains(_:)](vision/vncircle/contains(_:).md)
- [contains(_:inCircumferentialRingOfWidth:)](vision/vncircle/contains(_:incircumferentialringofwidth:).md)