Java动态嵌套循环

import java.util.Scanner;

public class DynamicNestedLoop {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入矩形的行数：");
        int rows = scanner.nextInt();
        System.out.print("请输入矩形的列数：");
        int cols = scanner.nextInt();

        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                System.out.print("* ");
            }
            System.out.println();
        }
    }
}