Vẽ tam giác

package tamgiac;

/**
 *
 * @author thieumao
 */
public class Tamgiac {

    public static void main(String[] args) {
        int n = 4;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}