---
title: "rsqrt(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/rsqrt(_:)-2k5rh"
---

# rsqrt(_:)

Returns the reciprocal square root of each element in a vector.

## Declaration

```swift
func rsqrt(_ x: SIMD2<Double>) -> SIMD2<Double>
```

## See Also

### Reciprocal and Reciprocal Square Root Functions

- [recip(_:)](simd/recip(_:)-43mv7.md)
- [simd_recip(_:)](simd/simd_recip(_:)-8nekc.md)
- [simd_fast_recip(_:)](simd/simd_fast_recip(_:)-lm0t.md)
- [simd_precise_recip(_:)](simd/simd_precise_recip(_:)-66n8k.md)
- [simd_rsqrt(_:)](simd/simd_rsqrt(_:)-ok9s.md)
- [simd_fast_rsqrt(_:)](simd/simd_fast_rsqrt(_:)-84dca.md)
- [simd_precise_rsqrt(_:)](simd/simd_precise_rsqrt(_:)-wrke.md)