Changed errorneous recursion solution to integer division and added a hint

Author: b4shy

05-Recursion/03-Recursion Homework Example Problems - SOLUTIONS.ipynb

@@ -86,7 +86,7 @@
     "    \n",
     "    # Recursion\n",
     "    else:\n",
-    "        return n%10 + sum_func(n/10)"
+    "        return n%10 + sum_func(n//10)"
    ]
   },
   {
@@ -95,18 +95,14 @@
    "metadata": {},
    "outputs": [
     {
-     "ename": "RecursionError",
-     "evalue": "maximum recursion depth exceeded while getting the str of an object",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mRecursionError\u001b[0m                            Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-4-a557a69e80e0>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0msum_func\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m4321\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m<ipython-input-3-98805590be21>\u001b[0m in \u001b[0;36msum_func\u001b[0;34m(n)\u001b[0m\n\u001b[1;32m      6\u001b[0m     \u001b[0;31m# Recursion\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      7\u001b[0m     \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 8\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mn\u001b[0m\u001b[0;34m%\u001b[0m\u001b[0;36m10\u001b[0m \u001b[0;34m+\u001b[0m \u001b[0msum_func\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mn\u001b[0m\u001b[0;34m/\u001b[0m\u001b[0;36m10\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "... last 1 frames repeated, from the frame below ...\n",
-      "\u001b[0;32m<ipython-input-3-98805590be21>\u001b[0m in \u001b[0;36msum_func\u001b[0;34m(n)\u001b[0m\n\u001b[1;32m      6\u001b[0m     \u001b[0;31m# Recursion\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      7\u001b[0m     \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 8\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mn\u001b[0m\u001b[0;34m%\u001b[0m\u001b[0;36m10\u001b[0m \u001b[0;34m+\u001b[0m \u001b[0msum_func\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mn\u001b[0m\u001b[0;34m/\u001b[0m\u001b[0;36m10\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;31mRecursionError\u001b[0m: maximum recursion depth exceeded while getting the str of an object"
-     ]
+     "data": {
+      "text/plain": [
+       "10"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -136,7 +132,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "4321 / 10"
+    "4321 // 10"
    ]
   },
   {
@@ -146,7 +142,9 @@
    },
    "source": [
     "We'll need to think of this function recursively by knowing that:\n",
-    "4502 % 10 + sum_func(4502/10)"
+    "4502 % 10 + sum_func(4502//10)\n",
+    "\n",
+    "Hint2: python3 automatically converts the result of a division to float! Make sure to use integer division (a//b)"
    ]
   },
   {