ForEach Loop

ForEach Loop

Purpose and Advantages: The for-each loop simplifies the process of iterating through elements in collections and arrays. It is designed to be more concise and less error-prone than traditional loops, reducing the risk of off-by-one errors and simplifying code.

Supported Data Structures: The for-each loop is primarily used for iterating over arrays and collections (e.g., Lists, Sets, Maps), but it can also be used with any data structure that implements the Iterable interface.

for (elementType element : array) {
    // Code to be executed for each element
}

int[] numbers = {1, 2, 3, 4, 5};

for (int num : numbers) {
    System.out.println(num);
}

List<String> names = Arrays.asList("Alice", "Bob", "Charlie");

for (String name : names) {
    System.out.println(name);
}

You can use the for-each loop with custom objects by implementing the Iterable interface in your class. This allows you to define custom iteration behavior.

Limitations and Use Cases

• When to Use Traditional Loops: While the for-each loop is convenient, it is not suitable for situations where you need to modify elements in the collection or when you require access to the index of the element.
• Read-Only Iteration: The for-each loop is best suited for read-only operations. If you need to modify elements, consider using a traditional loop.