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     "text": [
      "Key is present in the dictionary\n",
      "Key is not present in the dictionary\n"
     ]
    }
   ],
   "source": [
    "# ---------------------------------------------------------------\n",
    "# python best courses https://courses.tanpham.org/\n",
    "# ---------------------------------------------------------------\n",
    "# Check if a given key already exists in a dictionary\n",
    "# input\n",
    "# d = {1: 10, 2: 20, 3: 30, 4: 40, 5: 50, 6: 60}\n",
    "# is_key_present(5)\n",
    "# is_key_present(9)\n",
    "# output\n",
    "# Key is present in the dictionary                                                                              \n",
    "# Key is not present in the dictionary\n",
    "\n",
    "d = {1: 10, 2: 20, 3: 30, 4: 40, 5: 50, 6: 60}\n",
    "def is_key_present(x):\n",
    "  if x in d:\n",
    "      print('Key is present in the dictionary')\n",
    "  else:\n",
    "      print('Key is not present in the dictionary')\n",
    "is_key_present(5)\n",
    "is_key_present(9)\n"
   ]
  }
 ],
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