---
title: "+=(_:_:)"
framework: spatial
role: symbol
role_heading: Operator
path: "spatial/angle2d/+=(_:_:)"
---

# +=(_:_:)

Adds two angles and stores the result in the left-hand-side variable.

## Declaration

```swift
static func += (lhs: inout Angle2D, rhs: Angle2D)
```

## See Also

### Applying arithmetic operations

- [+(_:)](spatial/angle2d/+(_:).md)
- [+(_:_:)](spatial/angle2d/+(_:_:).md)
- [-(_:)](spatial/angle2d/-(_:).md)
- [-(_:_:)](spatial/angle2d/-(_:_:).md)
- [-=(_:_:)](spatial/angle2d/-=(_:_:).md)