---
title: radius0
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/ciradialgradient/radius0
---

# radius0

The radius of the starting circle to use in the gradient.

## Declaration

```swift
var radius0: Float { get set }
```

## See Also

### Instance Properties

- [center](coreimage/ciradialgradient/center.md)
- [color0](coreimage/ciradialgradient/color0.md)
- [color1](coreimage/ciradialgradient/color1.md)
- [radius1](coreimage/ciradialgradient/radius1.md)