21_嵌套循环.ipynb

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   "source": [
    "# 1. 嵌套循环"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
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     "text": [
      "*\t*\t*\t*\t\n",
      "*\t*\t*\t*\t\n",
      "*\t*\t*\t*\t\n"
     ]
    }
   ],
   "source": [
    "# 输出一个三行四列的矩形\n",
    "for i in range(1, 4):\n",
    "    for j in range(1, 5):\n",
    "        print('*', end='\\t')  # 不换行输出\n",
    "    print()  # 换行"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1 * 1 = 1\t\n",
      "2 * 1 = 2\t2 * 2 = 4\t\n",
      "3 * 1 = 3\t3 * 2 = 6\t3 * 3 = 9\t\n",
      "4 * 1 = 4\t4 * 2 = 8\t4 * 3 = 12\t4 * 4 = 16\t\n",
      "5 * 1 = 5\t5 * 2 = 10\t5 * 3 = 15\t5 * 4 = 20\t5 * 5 = 25\t\n",
      "6 * 1 = 6\t6 * 2 = 12\t6 * 3 = 18\t6 * 4 = 24\t6 * 5 = 30\t6 * 6 = 36\t\n",
      "7 * 1 = 7\t7 * 2 = 14\t7 * 3 = 21\t7 * 4 = 28\t7 * 5 = 35\t7 * 6 = 42\t7 * 7 = 49\t\n",
      "8 * 1 = 8\t8 * 2 = 16\t8 * 3 = 24\t8 * 4 = 32\t8 * 5 = 40\t8 * 6 = 48\t8 * 7 = 56\t8 * 8 = 64\t\n",
      "9 * 1 = 9\t9 * 2 = 18\t9 * 3 = 27\t9 * 4 = 36\t9 * 5 = 45\t9 * 6 = 54\t9 * 7 = 63\t9 * 8 = 72\t9 * 9 = 81\t\n"
     ]
    }
   ],
   "source": [
    "# 九九乘法表\n",
    "for i in range(1, 10):\n",
    "    for j in range(1, i+1):\n",
    "        # print('*', end='')\n",
    "        print(i, '*', j, '=', i*j, end='\\t')\n",
    "    print()"
   ]
  }
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