03-파이토치로_구현하는_ANN/autograd_basic.ipynb

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   "cell_type": "code",
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   "source": [
    "import torch"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "w = torch.tensor(1.0, requires_grad=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
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     "text": [
      "tensor(18.)\n",
      "l을 w로 미분한 값은 18.0\n"
     ]
    }
   ],
   "source": [
    "a = w*3\n",
    "l = a**2\n",
    "l.backward()\n",
    "print(w.grad)\n",
    "print('l을 w로 미분한 값은 {}'.format(w.grad))"
   ]
  }
 ],
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