Array Traversal

🚶‍♂️ What is Array Traversal?

Array traversal means accessing each element of the array one by one, usually to:

• Display elements

• Perform calculations (sum, max, etc.)

• Search for a specific value

🔁 Using for Loop

int[] arr = {10, 20, 30, 40, 50};

for(int i = 0; i < arr.length; i++) {
    System.out.println("Element at index " + i + ": " + arr[i]);
}

Element at index 0: 10
Element at index 1: 20
Element at index 2: 30
Element at index 3: 40
Element at index 4: 50

🔄 Using while Loop

int[] arr = {1, 2, 3, 4, 5};
int i = 0;

while(i < arr.length) {
    System.out.println(arr[i]);
    i++;
}

1
2
3
4
5

🔂 Using do-while Loop

int[] arr = {5, 10, 15};
int i = 0;

do {
    System.out.println(arr[i]);
    i++;
} while(i < arr.length);

5
10
15

🧾 Using for-each Loop (Enhanced For Loop)

This is the most concise and readable way to traverse arrays when index isn't needed.

int[] arr = {7, 14, 21, 28};

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

7
14
21
28

📌 Note: for-each cannot be used if you need the index or to modify specific elements.

🧠 When to Use What?