Exercises.ipynb

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       "5"
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     "execution_count": 2,
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   "source": [
    "txt='Python is powerful and easy.'\n",
    "len(txt.split())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": true
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   "outputs": [],
   "source": [
    "data = 'hello this is a nice world, welcome here'"
   ]
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   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "vowels = data.count('a') + data.count('e') + data.count('i') + data.count('o') + data.count('u')"
   ]
  },
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       "20"
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     "execution_count": 8,
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   "source": [
    "len(data) - data.count(' ') - vowels"
   ]
  },
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   "cell_type": "code",
   "execution_count": 85,
   "metadata": {
    "collapsed": true
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   "source": [
    "st = 'abccba'"
   ]
  },
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   "cell_type": "code",
   "execution_count": 86,
   "metadata": {
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   "source": [
    "import math"
   ]
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   "execution_count": 87,
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   "outputs": [],
   "source": [
    "central = math.floor(len(st)/2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 88,
   "metadata": {},
   "outputs": [],
   "source": [
    "central\n",
    "offset = 0\n",
    "if len(st)%2 != 0:\n",
    "    offset = 1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 89,
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       "True"
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   "source": [
    "st[:central+offset] == st[central:][::-1]"
   ]
  },
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   "cell_type": "code",
   "execution_count": 90,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'abc'"
      ]
     },
     "execution_count": 90,
     "metadata": {},
     "output_type": "execute_result"
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   "source": [
    "st[central:][::-1]"
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   "execution_count": 91,
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     "data": {
      "text/plain": [
       "'abc'"
      ]
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     "execution_count": 91,
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     "output_type": "execute_result"
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   "source": [
    "st[:central+offset]"
   ]
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   "execution_count": 72,
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     "execution_count": 72,
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    "offset"
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   "cell_type": "code",
   "execution_count": 78,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "2"
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     "execution_count": 78,
     "metadata": {},
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   "source": [
    "central"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 92,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "s = 'Www.HackerRank.com'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 93,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'wWW.hACKERrANK.COM'"
      ]
     },
     "execution_count": 93,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s.swapcase()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
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