Rust 練習用

main.rs

use std::io::{self};

fn main() {
    hello();
    
    loop_for();

    loop_if();
}

fn read_line() -> String {
    let mut s = String::new();
    io::stdin().read_line(&mut s).unwrap();
    return s.trim_right().to_owned();
}

fn hello() {
    println!("Hello, World!");
}

fn loop_for() {
    for i in 0..10 {
        println!("{}", i);
    }
}

fn loop_if() {
    for i in 0..10 {
        let s: String;
        if is_even(i) {
            s = format!("even: {}", i);
        } else {
            s = format!("odd: {}", i);
        }
        println!("{}", s);
    }
}

fn is_even(n: i32) -> bool {
    return n % 2 == 0;
}