---
title: "init(integrator:absoluteTolerance:relativeTolerance:)"
framework: accelerate
role: symbol
role_heading: Initializer
path: "accelerate/quadrature/init(integrator:absolutetolerance:relativetolerance:)"
---

# init(integrator:absoluteTolerance:relativeTolerance:)

Initializes and returns a quadrature instance.

## Declaration

```swift
init(integrator: Quadrature.Integrator, absoluteTolerance: Double = 1.0e-8, relativeTolerance: Double = 1.0e-2)
```