---
title: "write(_:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/filehandle/write(_:)"
---

# write(_:)

Writes the specified data synchronously to the file handle.

## Declaration

```swift
func write(_ data: Data)
```

## Parameters

- `data`: The data to write to the file handle.

## Discussion

Discussion If the handle represents a file, writing takes place at the file pointer’s current position. After it writes the data, the method advances the file pointer by the number of bytes written. important: This method raises fileHandleOperationException if the file descriptor is closed or isn’t valid, if the handle represents an unconnected pipe or socket endpoint, if there isn’t any free space on the file system, or if any other writing error occurs.

## See Also

### Related Documentation

- [availableData](foundation/filehandle/availabledata.md)

### Deprecated

- [readDataToEndOfFile()](foundation/filehandle/readdatatoendoffile().md)
- [readData(ofLength:)](foundation/filehandle/readdata(oflength:).md)
- [offsetInFile](foundation/filehandle/offsetinfile.md)
- [seekToEndOfFile()](foundation/filehandle/seektoendoffile().md)
- [seek(toFileOffset:)](foundation/filehandle/seek(tofileoffset:).md)
- [closeFile()](foundation/filehandle/closefile().md)
- [synchronizeFile()](foundation/filehandle/synchronizefile().md)
- [truncateFile(atOffset:)](foundation/filehandle/truncatefile(atoffset:).md)
- [NSFileHandleNotificationMonitorModes](foundation/nsfilehandlenotificationmonitormodes.md)