yes! YES!

use std::iter::Range;

fn main() {
    println!("I am such a great program. I can count to ten.")
    let start = 1;
    let stop = 10;
    
    start = 2;
    
    for i in natural_range(start, stop) {
        match i {
            10   => println!("and {}.", i),
            _    => print!("{}...", i)
        }
    }
}

fn natural_range (start: uint, stop: uint) -> Range<uint> {
    range(start, stop + 1)
}

/*

<anon>:8:5: 8:10 error: re-assignment of immutable variable `start`
<anon>:8     start = 2;
             ^~~~~
<anon>:5:9: 5:14 note: prior assignment occurs here
<anon>:5     let start = 1;
                 ^~~~~
error: aborting due to previous error
playpen: application terminated with error code 101

*/