read file contents in rust

To read the contents of a file in Rust, you can use the std::fs module. Here's an example of how you can accomplish this:

use std::fs::File;
use std::io::Read;

fn main() {
    let mut file = File::open("path/to/your/file.txt").expect("Failed to open file");
    let mut contents = String::new();
    file.read_to_string(&mut contents).expect("Failed to read file");
    println!("File contents: {}", contents);

In this example, we first import the necessary modules std::fs::File and std::io::Read. Then, we use the File::open function to open the file, providing the path to the file as an argument. If the file cannot be opened, an error message is displayed.

Next, we create a mutable String variable called contents to store the contents of the file. We use the read_to_string method on the file object to read the file's contents into the contents variable. If the file cannot be read, an error message is displayed.

Finally, we print the contents of the file using println!. You can replace the "path/to/your/file.txt" with the actual path to the file you want to read.