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   "source": [
    "## Parallel lists"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Let's write a function that compares two lists to see if they are the same"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
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   "source": [
    "def lists_equal(L1, L2):\n",
    "    '''Return True iff L1 and L2 have the same contents\n",
    "    \n",
    "    Arguments:\n",
    "    L1, L2 -- lists of integers\n",
    "    '''\n",
    "    # Need to check whether the two lists are the same length first, \n",
    "    # since otherwise we'll get an out-of-range error in the for-loop\n",
    "    if len(L1) != len(L2):\n",
    "        return False\n",
    "    \n",
    "    for i in range(len(L1)):\n",
    "        if L1[i] != L2[i]:\n",
    "            return False\n",
    "        \n",
    "    return True\n",
    "    "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Switch to Problem 6.1\n",
    "### Switch to Problem 6.2\n",
    "### Switch to Problem 6.3\n",
    "### Switch to Problem 6.4"
   ]
  }
 ],
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