Iterator class provides an access to the classes which are inside the containers (it holds a GROUP of objects in an organized way). The containers include the data structure, class, and abstract data type. Each container type supports one category of iterator depending on the container's requirements. The categories are input, output, forward, bidirectional, and random access. These PROPERTIES specify the BEHAVIOR that the iterator must exhibit in order to SUPPORT the container. Iterators can be initialized, INCREMENTED, and decremented, and their bounds can be limited to the current extent of the containers. If you can cause an iterator to be equal to another iterator by incrementing the first one, the second iterator is reachable from the first. The two iterators are also known to refer to the same container. The two iterators can therefore define a range of objects in the container.

Iterator class provides an access to the classes which are inside the containers (it holds a group of objects in an organized way). The containers include the data structure, class, and abstract data type. Each container type supports one category of iterator depending on the container's requirements. The categories are input, output, forward, bidirectional, and random access. These properties specify the behavior that the iterator must exhibit in order to support the container. Iterators can be initialized, incremented, and decremented, and their bounds can be limited to the current extent of the containers. If you can cause an iterator to be equal to another iterator by incrementing the first one, the second iterator is reachable from the first. The two iterators are also known to refer to the same container. The two iterators can therefore define a range of objects in the container.