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   "metadata": {},
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    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Enter your guess: 50\n",
      "Lower.\n",
      "Enter your guess: 25\n",
      "Lower.\n",
      "Enter your guess: 13\n",
      "Congratulations! You guessed correctly.\n"
     ]
    }
   ],
   "source": [
    "import random\n",
    "\n",
    "true_value = random.randint(0, 100)\n",
    "\n",
    "while True:\n",
    "    guess = input('Enter your guess: ')\n",
    "\n",
    "    try:\n",
    "        guess = int(guess)\n",
    "\n",
    "        if guess == true_value:\n",
    "            print('Congratulations! You guessed correctly.')\n",
    "            break\n",
    "        elif guess > true_value:\n",
    "            print('Lower.')  # user guessed too high\n",
    "        else:\n",
    "            print('Higher.')  # user guessed too low\n",
    "\n",
    "    # when the input is invalid\n",
    "    except ValueError:\n",
    "        print('Please enter a valid number.')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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