---
id: system-file_write
name: System.file_write
category: system
kind: namespace-method
tokens: System.file_write
sig: System.file_write(file, buf, n) -> int
tip: Write bytes to a file.
order: 8
ns: System
member: file_write
---

Writes <code>n</code> bytes from <code>buf</code> to <code>file</code> and returns the number written.