---
title: "data(using:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nsstring/data(using:)"
---

# data(using:)

Returns an NSData object containing a representation of the receiver encoded using a given encoding.

## Declaration

```swift
func data(using encoding: UInt) -> Data?
```

## Parameters

- `encoding`: A string encoding. For possible values, see doc://com.apple.foundation/documentation/Foundation/NSStringEncoding.

## Return Value

Return Value The result of invoking data(using:allowLossyConversion:) with false as the second argument (that is, requiring lossless conversion).

## See Also

### Working with Encodings

- [availableStringEncodings](foundation/nsstring/availablestringencodings.md)
- [defaultCStringEncoding](foundation/nsstring/defaultcstringencoding.md)
- [stringEncoding(for:encodingOptions:convertedString:usedLossyConversion:)](foundation/nsstring/stringencoding(for:encodingoptions:convertedstring:usedlossyconversion:).md)
- [localizedName(of:)](foundation/nsstring/localizedname(of:).md)
- [canBeConverted(to:)](foundation/nsstring/canbeconverted(to:).md)
- [data(using:allowLossyConversion:)](foundation/nsstring/data(using:allowlossyconversion:).md)
- [description](foundation/nsstring/description.md)
- [fastestEncoding](foundation/nsstring/fastestencoding.md)
- [smallestEncoding](foundation/nsstring/smallestencoding.md)
- [StringEncodingDetectionOptionsKey](foundation/stringencodingdetectionoptionskey.md)
- [NSString Handling Exception Names](foundation/nsstring-handling-exception-names.md)