输出九九乘法表

  //输出九九乘法口诀表
    public static void main(String[] args) {
int b;
        for (int i = 1; i <=9; i++) {
            for (int a = 1; a <=i ; a++) {

                System.out.print(i+"x"+a+"="+i*a+" ");
            }
            System.out.println();
        }

        }
    }

输出结果：

1x1=1 
2x1=2 2x2=4 
3x1=3 3x2=6 3x3=9 
4x1=4 4x2=8 4x3=12 4x4=16 
5x1=5 5x2=10 5x3=15 5x4=20 5x5=25 
6x1=6 6x2=12 6x3=18 6x4=24 6x5=30 6x6=36 
7x1=7 7x2=14 7x3=21 7x4=28 7x5=35 7x6=42 7x7=49 
8x1=8 8x2=16 8x3=24 8x4=32 8x5=40 8x6=48 8x7=56 8x8=64 
9x1=9 9x2=18 9x3=27 9x4=36 9x5=45 9x6=54 9x7=63 9x8=72 9x9=81 

Process finished with exit code 0