请问一下这个用for循环怎么打出来

Question

1
1 3
1 3 5
1 3 5 7

Answer 1

package test;

public class Date {
    public static void main(String[] args) {
        for (int i = 1; i <= 7; i += 2) {
            for (int j = 1; j <= i; j += 2) {
                if (j == i) {
                    System.out.print(i);
                } else {
                    System.out.print(j + " ");
                }
            }
            System.out.println();
        }
    }

}

运行截图：