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rustHow to read file line by line in rust


Reading a file line by line in Rust can be done using the std::fs::File type and the BufReader type from the std::io::BufReader module. To read a file line by line, first open the file in read-only mode using the File::open method. Then, create a BufReader from the file handle. Finally, use the BufReader::lines method to iterate over the lines of the file. The following ## Code example shows how to read a file line by line:

use std::fs::File;
use std::io::{BufReader, BufRead};

fn main() {
    let file = File::open("my_file.txt").expect("Unable to open file");
    let reader = BufReader::new(file);

    for line in reader.lines() {
        let line = line.expect("Unable to read line");
        println!("{}", line);
    }
}

In this example, the File::open method is used to open the file in read-only mode. Then, a BufReader is created from the file handle. Finally, the BufReader::lines method is used to iterate over the lines of the file. For each line, the expect method is used to unwrap the Result type and print the line.

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