# fseek

Set the file pointer to a location.

## 📝 Syntax

* fseek(fid, offset, origin)
* status = fseek(fid, offset, origin)

## 📥 Input argument

* fid - an integer value: file descriptor
* offset - an integer value: number of bytes to move from origin.
* origin - an integer value or a string: location in the file.

## 📤 Output argument

* status - an integer value: 0 or -1 if there is an error.

## 📄 Description

fseek moves the file pointer to the location offset within the file fid.

origin can take as value:

'bof' or -1 : beginning of file.

'cof' or 0 : current position in file.

'eof' or 1 : end of file.

offset may be one of the predefined variables SEEK\_CUR (current position, or 0), SEEK\_SET (beginning, or -1), or SEEK\_END (end of file, or 1).

## 💡 Example

```matlab

fileID = fopen([tempdir(), 'fseek.txt'],'wt');
fprintf(fileID, 'son is beautiful.');
fseek(fileID, SEEK_CUR, 'bof');
fprintf(fileID, 'sun');
fclose(fileID);
R = fileread([tempdir(), 'fseek.txt'])
```

## 🔗 See also

[frewind](https://nelson-9.gitbook.io/Nelson/markdown/en/stream_manager/frewind).

## 🕔 History

| Version | 📄 Description  |
| ------- | --------------- |
| 1.0.0   | initial version |
