IT-Course/3.7.1.ipynb

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   "source": [
    "from math import sqrt\n",
    "i = 1\n",
    "s = 0\n",
    "item = 1\n",
    "while item > 0.000001:\n",
    "    s = s + item\n",
    "    i = i + 1\n",
    "    item = 1 / (i * i)\n",
    "pi = sqrt(6 * s)\n",
    "print(\"pi 的值是{}\".format(pi))"
   ]
  }
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