snippet4.ipynb

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    "class Letter:\n",
    "    def __init__(self):\n",
    "        self.character = raw_input(\"Enter a Letter: \")\n",
    "    \n",
    "    def check_if_letter(self):\n",
    "        return self.character.isalpha()\n",
    "    \n",
    "    def lower_case(self):\n",
    "        self.lower_c = self.character.lower()\n",
    "        return self.lower_c\n",
    "    \n",
    "    def is_vowel(self):\n",
    "        if self.lower_c in ['a','e','i','o','u']:\n",
    "            return True\n",
    "        else:\n",
    "            return False"
   ]
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