Here is a list: one,two,three

ListContains checks for substring "wo" in the list elements:

   Substring "wo" is in element 2 of list.

ListFind cannot check for a substring within an element; therefore, in the code, it does not find substring "wo" (it returns 0):

   Substring "wo" is in element 0 of the list.

If you specify a string that exactly equals an entire list element, such as "two", both ListContains and ListFind find it, in the second element:

   ListContains: The string "two" is in element 2 of the list.    

ListFind: The string "two" is in element 2 of the list.