---
title: "localizedCaseInsensitiveCompare(_:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nsstring/localizedcaseinsensitivecompare(_:)"
---

# localizedCaseInsensitiveCompare(_:)

Compares the string with a given string using a case-insensitive, localized, comparison.

## Declaration

```swift
func localizedCaseInsensitiveCompare(_ string: String) -> ComparisonResult
```

## Parameters

- `string`: The string with which to compare the receiver. This value must not be nil. If this value is nil, the behavior is undefined and may change in future versions of macOS.

## Return Value

Return Value Returns an ComparisonResult value that indicates the lexical ordering. ComparisonResult.orderedAscending the receiver precedes aString in lexical ordering, ComparisonResult.orderedSame the receiver and aString are equivalent in lexical value, and ComparisonResult.orderedDescending if the receiver follows aString.

## Discussion

Discussion This method uses the current locale.

## See Also

### Identifying and Comparing Strings

- [caseInsensitiveCompare(_:)](foundation/nsstring/caseinsensitivecompare(_:).md)
- [compare(_:)](foundation/nsstring/compare(_:).md)
- [localizedCompare(_:)](foundation/nsstring/localizedcompare(_:).md)
- [compare(_:options:)](foundation/nsstring/compare(_:options:).md)
- [compare(_:options:range:)](foundation/nsstring/compare(_:options:range:).md)
- [compare(_:options:range:locale:)](foundation/nsstring/compare(_:options:range:locale:).md)
- [localizedStandardCompare(_:)](foundation/nsstring/localizedstandardcompare(_:).md)
- [hasPrefix(_:)](foundation/nsstring/hasprefix(_:).md)
- [hasSuffix(_:)](foundation/nsstring/hassuffix(_:).md)
- [isEqual(to:)](foundation/nsstring/isequal(to:).md)
- [hash](foundation/nsstring/hash.md)
- [NSString.CompareOptions](foundation/nsstring/compareoptions.md)
- [NSString.EncodingConversionOptions](foundation/nsstring/encodingconversionoptions.md)