Java For-each Loop (Enhanced For Loop)

In Java, the for-each loop, also known as the enhanced for loop, simplifies iteration over elements of arrays or collections. Here's a concise overview:

Syntax:

for (dataType element : arrayOrCollection) {
    // Code to execute for each element
}

dataType:

• Specifies the data type of elements in the array or collection.

element:

• Represents the variable that holds the current element value in each iteration.

arrayOrCollection:

• Represents the array or collection over which iteration occurs.

For-each Loop Example:

• Iterates over elements of an array.
• Example:

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

Enhanced For Loop with Collections:

• Iterates over elements of a collection.
• Example:

List<String> names = new ArrayList<>();
names.add("Alice");
names.add("Bob");
names.add("Charlie");
for (String name : names) {
    System.out.println(name);
}

 

Summary

The for-each loop provides a concise and readable way to iterate over arrays or collections in Java, reducing the need for explicit indexing and making code more expressive. Understanding how to use the enhanced for loop is essential for efficient iteration in Java programs.