Taking input in Rust¶

In order to ask user to input a string, you can use something like this:

use std::io;

fn main() {
    let mut a=String::new();
    println!("Enter a String!");
    io::stdin().read_line(&mut a).expect("Failed");
    println!(" {} ", a);
}

The io::stdin().read_line(&mut a).expect("Failed"); line will read in a line from stdio and put it into the a variable. By default it will put Failed.

In order to use numbers:

use std::io;

fn main() {
    let mut a=String::new();
    println!("Enter a number!");
    io::stdin().read_line(&mut a).expect("Failed");
    let a:i32 = a.trim().parse().expect("Failed");
    println!(" {} ", a);
}

The .trim() function will trim the whitespace.