What is the difference between iterator and foreach in programming?

What is the difference between iterator and foreach in programming?

The main difference is that an iterator provides more control over the iteration process, while foreach is simpler and more concise.

Can you give me an example of how to use both in Java?

Sure! Here's an example using an iterator:

List<String> list = Arrays.asList("A", "B", "C");
Iterator<String> iterator = list.iterator();
while (iterator.hasNext()) {
    System.out.println(iterator.next());
}

And here's how you would use foreach:

for (String item : list) {
    System.out.println(item);
}

Which one is more efficient?

In terms of performance, both are generally similar for most use cases, but iterators can be more efficient in certain scenarios where you need to remove elements during iteration.

Are there any limitations to using foreach?

Yes, foreach cannot modify the collection while iterating, and it doesn't provide access to the index of the current element.