九九乘法口诀表

九九乘法表
1x1 = 1
1x2 = 2 2x2 = 4
1x3 = 3 2x3 = 6 3x3 = 9

# 外层循环控制行数
for i in range(1, 10):
    # 内存循环控制每行怎么打印
    for j in range(1, i+1):
        print('{}x{} = {}'.format(j, i, j*i), end=' ')
    # 换行
    print()