RUST

how to open a file rust

use std::fs::File;

fn main() -> std::io::Result<()> {
    let mut f = File::open("foo.txt")?;
    Ok(())
}

read file Rust

use std::fs;

fn main() {
  let content = match fs::read_to_string("Cargo.toml") {
    Result::Ok(value) => value,
    Result::Err(error) => panic!("{}", error) 
  };

  println!("{}", content)
}