---
title: "simd_reduce_max(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_reduce_max(_:)-4qug2"
---

# simd_reduce_max(_:)

Returns the maximum value in a vector.

## Declaration

```swift
func simd_reduce_max(_ x: simd_float4) -> Float
```

## See Also

### Reduce Functions

- [simd_reduce_add(_:)](simd/simd_reduce_add(_:)-2yn18.md)
- [reduce_add(_:)](simd/reduce_add(_:)-8m4ir.md)
- [reduce_max(_:)](simd/reduce_max(_:)-263wv.md)
- [simd_reduce_min(_:)](simd/simd_reduce_min(_:)-4un1u.md)
- [reduce_min(_:)](simd/reduce_min(_:)-1xt53.md)