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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Errors and Exceptions:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "OS Error occured\n",
      "Always going to run\n"
     ]
    }
   ],
   "source": [
    "try:\n",
    "    with open('newfile.txt','r') as f:\n",
    "        f.write(\"New line to write.\")\n",
    "except OSError:\n",
    "    print('OS Error occured')\n",
    "finally:\n",
    "    print('Always going to run')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "def ask_for_int():\n",
    "    \n",
    "    while True:\n",
    "        try:\n",
    "            result = int(input(\"Please provide a number: \"))\n",
    "        except:\n",
    "            print(\"\\nIncorrect Value!\\n\")\n",
    "            continue\n",
    "        else:\n",
    "            print(\"\\n Thank you. \")\n",
    "            break\n",
    "        finally:\n",
    "            print(\"End of the code block. \\n\\n\")\n",
    "        "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Please provide a number: ty\n",
      "\n",
      "Incorrect Value!\n",
      "\n",
      "End of the code block. \n",
      "\n",
      "\n",
      "Please provide a number: 2.3\n",
      "\n",
      "Incorrect Value!\n",
      "\n",
      "End of the code block. \n",
      "\n",
      "\n",
      "Please provide a number: 4\n",
      "\n",
      " Thank you. \n",
      "End of the code block. \n",
      "\n",
      "\n"
     ]
    }
   ],
   "source": [
    "ask_for_int()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Problem 1\n",
    "Handle the exception thrown by the code below by using <code>try</code> and <code>except</code> blocks."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Error Occured\n"
     ]
    }
   ],
   "source": [
    "try:\n",
    "    for i in ['a','b','c']:\n",
    "        print(i**2)\n",
    "except:\n",
    "    print('Error Occured')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Problem 2\n",
    "Handle the exception thrown by the code below by using <code>try</code> and <code>except</code> blocks. Then use a <code>finally</code> block to print 'All Done.'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Cannot divide by 0\n",
      "All Done\n"
     ]
    }
   ],
   "source": [
    "try:\n",
    "    x = 5\n",
    "    y = 0\n",
    "\n",
    "    z = x/y\n",
    "except ZeroDivisionError:\n",
    "    print('Cannot divide by 0')\n",
    "except:\n",
    "    print('Error Occured')\n",
    "finally:\n",
    "    print('All Done')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Problem 3\n",
    "Write a function that asks for an integer and prints the square of it. Use a <code>while</code> loop with a <code>try</code>, <code>except</code>, <code>else</code> block to account for incorrect inputs."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "def ask():\n",
    "    \n",
    "    # Waiting for the correct response\n",
    "    waiting = True\n",
    "    while waiting:\n",
    "        try:\n",
    "            number = int(input('Input an integer: '))\n",
    "        except:\n",
    "            print('\\nAn error occurred! Please try again!\\n')\n",
    "            continue\n",
    "        else:\n",
    "            waiting = False\n",
    "            \n",
    "    print(f'\\nThank you, your number squared is {number**2}')    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Input an integer: y\n",
      "\n",
      "An error occurred! Please try again!\n",
      "\n",
      "Input an integer: r\n",
      "\n",
      "An error occurred! Please try again!\n",
      "\n",
      "Input an integer: 5\n",
      "\n",
      "Thank you, your number squared is 25\n"
     ]
    }
   ],
   "source": [
    "ask()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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