---
title: "reduce(_:_:)"
framework: swift-package-manager
role: symbol
role_heading: Instance Method
path: "swift-package-manager/documentation/packageplugin/filelist/reduce(_:_:)"
---

# reduce(_:_:)

Inherited from Sequence.reduce(_:_:).

## Declaration

```swift
func reduce<Result>(_ initialResult: Result, _ nextPartialResult: (Result, Self.Element) throws -> Result) rethrows -> Result
```