Error in my code

[stullis]

The final result is None because list.sort() sorts in place, meaning no value is returned. When a variable is set based on a function/method that returns nothing, it is set as None.

In general, this needs some refactoring before it will work. Consider these questions:

• Why sort the code for every new addition?
  
• Does list.sort() take any arguments? Which ones? (Research standard library documentation.)
  
• If variable c is instantiated in number(), how would the while loop outside of number know about c? Is that proper coding or just a quirk of Python? And, if it's a quirk, how would the loop know about c changing to a different value? (Think about scope.)
  
• Where is there any division in number()?