10. Making the code more DRY

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https://github.com/prophen/intro-to-rust/blob/nikema's-notes/exercises/10.md

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use std::io;
use std::process;

fn main() {
    loop {
        println!("Please enter the first number: ");
        let a: u32 = read_user_data();
        println!("Please enter the second number: ");
        let b: u32 = read_user_data();
        let result = sum(a, b);
        println!("Result: {}", result);
    }
}
fn sum(a: u32, b:u32 ) -> u32 {
    a + b
}
fn read_user_data() -> u32 {
    let mut input = String::new();
    io::stdin().read_line(&mut input).unwrap();
    let number: u32;
    match input.trim().parse() {
        Ok(value) => number = value,
        Err(_error)=> {
            eprintln!("This is unfortunately not a number");
            process::exit(1)
        }
    }
    number
}