how-to-write-line-to-file-in-rust.md

How to write line to file in Rust

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Writing to a file in Rust is a relatively straightforward process. To do so, you must first open a file in write-only mode using the File::create method. Then, you can write data to the file using the write_all method. Finally, you must close the file using the close method. The following ## Code example shows how to write a line of text to a file:

use std::fs::File;
use std::io::prelude::*;

fn main() {
    let mut file = File::create("my_file.txt").expect("Failed to create file");
    let line = "This is a line of text written to a file.";
    file.write_all(line.as_bytes()).expect("Failed to write to file");
    file.close().expect("Failed to close file");
}

In this example, we first create a file called my_file.txt using the File::create method. Then, we write a line of text to the file using the write_all method. Finally, we close the file using the close method. After running this code, the file my_file.txt will contain the line of text that was written to it.

Helpful links

• File::create
• write_all
• close

group: rust-files