Sets

1. sets
2. set operations
3. Creating a set
4. Creating a set from a list
5. Converting set to list
6. Creating an empty set
7. Adding an element to a set (add)
8. Merging one set into another set (update)
9. set intersection
10. set subset
11. set symmetric difference
12. set union
13. set relative complement (difference)
14. Set of numbers
15. Set of lists
16. Set of tuples
17. Create set from List