# integrate(over:integrand:) Performs the integration over the supplied vector function. ``` func integrate(over interval: ClosedRange, integrand: (UnsafeBufferPointer, UnsafeMutableBufferPointer) -> ()) -> Result<(integralResult: Double, estimatedAbsoluteError: Double), Quadrature.Error> ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)