rustHow do you write a string to a file in Rust?

Writing a string to a file in Rust is a simple process. The following example code block shows how to do this:

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

fn main() {
    let mut file = File::create("my_file.txt").expect("Failed to create file");
    let string = "Hello, world!";
    file.write_all(string.as_bytes()).expect("Failed to write to file");
}

Code explanation

1. use std::fs::File;: This imports the File type from the std::fs module.
2. use std::io::prelude::*;: This imports the write_all method from the std::io::prelude module.
3. let mut file = File::create("my_file.txt").expect("Failed to create file");: This creates a new file called my_file.txt and assigns it to the file variable.
4. let string = "Hello, world!";: This creates a string variable called string and assigns it the value "Hello, world!".
5. file.write_all(string.as_bytes()).expect("Failed to write to file");: This writes the contents of the string variable to the file variable.

The output of the example code is a file called my_file.txt containing the string Hello, world!.

Helpful links

• std::fs
• std::io::prelude

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