As long as we're posting code/golfing (and since I've been lots of file parsing lately and it's fresh): use std::io::prelude::*; use std::fs::File;

As long as we're posting code/golfing (and since I've been lots of file parsing lately and it's fresh): use std::io::prelude::*; use std::fs::File; fn main() { let mut s = String::new(); File::open("numbers.txt") .unwrap() .read_to_string(&mut s); let sum = s.lines() .map(|l| l.parse::<i32>().unwrap()) .fold(0, |acc, i| acc+i); println!("{}", sum); }