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

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