Rust Program to Count number of lines present in the file

Count number of lines present in the file

Rust Programming Language

Problem

Rust program that counts the number of lines in a given file.

Input

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

use std::fs::File;

fn main() -> std::io::Result<()> {

    let file = File::open("filename.txt")?;

    let reader = BufReader::new(file);

    let mut count = 0;

    for line in reader.lines() {

        count += 1;

    }

    println!("Number of lines: {}", count);

    Ok(())

}{codeBox}

Output

Number of lines: 10{codeBox}

Explanation

This program uses the std::io::BufReader to efficiently read the file line by line and count the number of lines present in the file. Note that you will need to replace "filename.txt" with the path to the file you want to count the lines of.