Update 06. Functions.ipynb

Author: APMonitor

06. Functions.ipynb

@@ -10,6 +10,8 @@
     "\n",
     "Functions create modular code that can do the same task repeatedly without you having to type out the same code each time. Functions make complex code accessible with a single statement. You also can create your own function, but there are also some are built in to Python or in many packages. One built in function you have already seen is the ```print()``` function.\n",
     "\n",
+    "[Python Playlist on YouTube](https://www.youtube.com/watch?v=dP3e2jIHqXw&list=PLLBUgWXdTBDi3J05aMVG1knUpqRhkbc46)",
+    "\n",
     "[![Functions](https://apmonitor.com/che263/uploads/Begin_Python/BeginPython06.png)](https://www.youtube.com/watch?v=dP3e2jIHqXw&list=PLLBUgWXdTBDi3J05aMVG1knUpqRhkbc46 \"Functions\")\n",
     "\n",
     "For the incubation example, a display function could be used such as the function `ctemp()` to print the current temperature. This re-uses the print statement so that you don't need to type it out each time for temperatures 1 and 2.\n",