iterator

the iterator allows you to loop through each element in the collection.

you can use an iterator to access elements without exposing the underlying structure.

the iterator pattern is commonly used in software design.

always check if the iterator has next element before proceeding.

the list iterator provides bidirectional traversal.

you need to initialize the iterator before using it.

the iterator returns null when it reaches the end of the sequence.

each iterator maintains its own position in the collection.

the iterator can be reset to traverse the collection again.

using an iterator is more efficient than indexed access in some cases.

the iterator interface defines standard methods for traversal.

you can create multiple iterators for the same collection.