Enhanced for loop (for‑each)

The enhanced for loop (also called for‑each loop) simplifies iterating over arrays and collections. It is read‑only (cannot modify the collection while iterating).

Syntax:

for (type variable : arrayOrCollection) {
    // loop body
}

Examples:

int[] numbers = {1, 2, 3, 4, 5};
for (int num : numbers) {
    System.out.println(num);
}

With collections:

List<String> names = Arrays.asList("Alice", "Bob", "Charlie");
for (String name : names) {
    System.out.println(name);
}

Limitations:

• Cannot modify the underlying array/collection (except via the variable, but it doesn’t affect the source).
• Cannot access the current index directly.

// To modify elements, use traditional for loop
for (int i = 0; i < numbers.length; i++) {
    numbers[i] *= 2;
}