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     "text": [
      "dbca\n",
      "52341\n"
     ]
    }
   ],
   "source": [
    "#  Write a Python program to change a given string to a new string where the first and last chars have been exchanged\n",
    "\n",
    "def change_sring(str1):\n",
    "      return str1[-1:] + str1[1:-1] + str1[:1]\n",
    "    \n",
    "print(change_sring('abcd'))\n",
    "print(change_sring('12345'))"
   ]
  }
 ],
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