---
title: "rsqrt(epsilon:)"
framework: accelerate
role: symbol
role_heading: Instance Method
path: "accelerate/bnnsgraph/builder/tensor/rsqrt(epsilon:)"
---

# rsqrt(epsilon:)

Adds an element-wise rsqrt operation to the current graph.

## Declaration

```swift
func rsqrt(epsilon: Float = .ulpOfOne.squareRoot()) -> BNNSGraph.Builder.Tensor<T>
```