Read A File Into A String In Rust

March 2023

The basic approach is to use:

use std::fs;

fn main() {
    let data = fs::read_to_string("test.txt").unwrap();
    println!("{}", data);
}

Output:

This is test file for different things to use

Don't count on it having any given content

An `.unwrap()rust is used because `read_to_string()`rust` returns a Result. The above works if you're sure the file won't cause an error or you're okay with a panic if it does. Basic error handling can be used when that's not the case:

use std::fs;

let data = fs::read_to_string(
    "some/path.txt",
);

match data {
    Ok(value) => println!("{}", value),
    Err(e) => println!("{}", e),
}

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