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RUST Read single line from stdin

In Rust 0.4, use the ReaderUtil trait to access the read_line function. Note that you need to explicitly cast the value to a trait type, for example, reader as io::ReaderUtil:

RUST Example of taking input from user

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

fn main() {
    let stdin = io::stdin();
    for line in stdin.lock().lines() {
        println!("{}", line.unwrap());
    }
}

Manually iterate without a for-loop

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

fn main() {
    let stdin = io::stdin();
    let mut iterator = stdin.lock().lines();
    let line1 = iterator.next().unwrap().unwrap();
    let line2 = iterator.next().unwrap().unwrap();
}


You cannot write a one-liner to do what you want. But the following reads a single line.

You can also use the text_io crate for super simple input:

Example using text_io

#[macro_use] extern crate text_io;

fn main() {
    // reads until a \n is encountered
    let line: String = read!("{}\n");
}

Conclusion

In this page (written and validated by ) you learned about Rust Read single line from stdin . What's Next? If you are interested in completing Rust tutorial, your next topic will be learning about: Rust Data Types.



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