Rustlings__variables

练习过程中的随手记,很多问题也未深究,,简单问题可能直接贴改完之后的代码,..分享出来,若能帮助大家,意外乐趣

variables1.rs

// variables1.rs
// Make me compile! Execute the command `rustlings hint variables1` if you want a hint :)

// About this `I AM NOT DONE` thing:
// We sometimes encourage you to keep trying things on a given exercise,
// even after you already figured it out. If you got everything working and
// feel ready for the next exercise, remove the `I AM NOT DONE` comment below.


fn main() {
    let x = 5;
    println!("x has the value {}", x);
}

variables2.rs

// variables2.rs
// Make me compile! Execute the command `rustlings hint variables2` if you want a hint :)


fn main() {
    let x=1;
    if x == 10 {
        println!("Ten!");
    } else {
        println!("Not ten!");
    }
}

variables3.rs

// variables3.rs
// Make me compile! Execute the command `rustlings hint variables3` if you want a hint :)


fn main() {
    let mut x = 3;
    println!("Number {}", x);
    x = 5;
    println!("Number {}", x);
}

variables4.rs

// variables4.rs
// Make me compile! Execute the command `rustlings hint variables4` if you want a hint :)


fn main() {
    let x: i32 = 1;
    println!("Number {}", x);
}

variables5.rs

// variables5.rs
// Make me compile! Execute the command `rustlings hint variables5` if you want a hint :)

fn main() {
    let number = "3";
    println!("Number {}", number);
    let number = 3;
    println!("Number {}", number);
}