title: Finding the mode of a list
body: <p>Given a list of items, recall that the <em>mode</em> of the list is the item that occurs most often.</p>
  
  <p>I would like to know how to create a function that can find the mode of a list but that displays a message if the list does not have a mode (e.g., all the items in the list only appear once). I want to make this function without importing any functions. I'm trying to make my own function from scratch.</p>