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.

Helpful links

• std::fs::File
• std::io::BufReader
• std::io::BufRead

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