---
title: "reduce_max(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/reduce_max(_:)-263wv"
---

# reduce_max(_:)

Returns the maximum value in a vector.

## Declaration

```swift
func reduce_max(_ x: SIMD4<Float>) -> Float
```

## See Also

### Reduce Functions

- [simd_reduce_add(_:)](simd/simd_reduce_add(_:)-2yn18.md)
- [reduce_add(_:)](simd/reduce_add(_:)-8m4ir.md)
- [simd_reduce_max(_:)](simd/simd_reduce_max(_:)-4qug2.md)
- [simd_reduce_min(_:)](simd/simd_reduce_min(_:)-4un1u.md)
- [reduce_min(_:)](simd/reduce_min(_:)-1xt53.md)