Sets vs List code example

Example 1: List vs Set

List > Ordered and Indexed Collection, May contain duplicates
Set > Collection of Unique values, not ordered, no indexing

Example 2: set vs list

Set is unordered
List is ordered collection, 
List allow duplicate elements
Set does not allow duplicates.
List can have multiple null elements
Set will allow only one null element.
The List can contain duplicate elements
Set includes unique items.