Because sets are unordered pools of data, methods that modify them do not rely on indices. You can add or remove elements, but remember that sets strictly enforce uniqueness, so intentionally adding a duplicate value will have no effect. Some of the most common set methods are `add()`, `remove()`, and `clear()`.
Key Points
.add(value): Drops a new element anywhere into the pool. If the value already exists, no change occurs.
.remove(value): Searches the pool and deletes the exact value. Raises a KeyError if the item does not exist.
.clear(): Instantly empties the entire set, removing all elements at once.