diff --git a/PythonIntroductionLML.ipynb b/PythonIntroductionLML.ipynb
index 8c33f62..b3c51a7 100644
--- a/PythonIntroductionLML.ipynb
+++ b/PythonIntroductionLML.ipynb
@@ -269,6 +269,22 @@
     "    print(str(x)+\" es un cubo perfecto\")"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Python tiene una estructura for-else que ayuda para estos casos :)\n",
+    "x=64\n",
+    "for ans in range(0,x):\n",
+    "    if ans**3 == x:\n",
+    "        print(str(x)+\" es un cubo perfecto\")\n",
+    "        break\n",
+    "else:\n",
+    "    print(str(x)+\" no es un cubo perfecto\")"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -723,7 +739,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.6.7"
   }
  },
  "nbformat": 4,