---
title: "formSymmetricDifference(_:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nsstring/enumerationoptions/formsymmetricdifference(_:)"
---

# formSymmetricDifference(_:)

## Declaration

```swift
mutating func formSymmetricDifference(_ other: String.EnumerationOptions)
```