Rust int類型和String類型互轉

fn main() {
    let int_value = 5;
    let string_value = int_value.to_string();//int to String
    let back_int = string_value.parse::<i32>().unwrap();//String to int
    //let back_int = string_value.parse::<u32>().unwrap();
    //let back_int = string_value.parse::<i16>().unwrap();
    println!("int_value is {:?}", int_value);
    println!("back_int is {:?}", back_int);

}

參考：https://stackoverflow.com/questions/27043268/convert-a-string-to-int-in-rust