---
id: system-file_seek
name: System.file_seek
category: system
kind: namespace-method
tokens: System.file_seek
sig: System.file_seek(file, offset, whence) -> int
tip: Move a file's read/write position.
order: 9
ns: System
member: file_seek
---

Seeks <code>file</code> to <code>offset</code> relative to <code>whence</code> (as C <code>fseek</code>).