Task

Express a number in decimal as a fixed-length string with leading zeros.



For example, the number   7.125   could be expressed as   00007.125.




 
fn main() {
    let x = 7.125;
 
    println!("{:9}", x);
    println!("{:09}", x);
    println!("{:9}", -x);
    println!("{:09}", -x);
}
 