rust study : while loop

while.rs

// The rust programming ko https://rinthel.github.io/rust-lang-book-ko/ch03-05-control-flow.html
// compiled on https://play.rust-lang.org/
/* result
*
**
***
****
*****
******
*******
********
*********
*/
fn main() {
    let mut row = 0;
    while row < 10 {
        let mut column = 0;
        while column < row {
            print!("*");
            column = column + 1;
        }
        println!("");
        row = row + 1;
    }
}