? Java Array Traversal

? Quick Overview

Array traversal in Java means accessing each element of an array one by one. It is commonly used to read, display, update, or process array values efficiently.

? Key Concepts

Arrays store elements in contiguous memory locations
Index starts from 0 and ends at length - 1
Traversal is usually done using loops
Java supports both indexed and enhanced traversal

? Syntax / Theory

for loop – full control using index
while loop – condition-based traversal
enhanced for – simple read-only traversal

? Code Example(s)

? View Code Example

// Traversing an array using a for loop
class ArrayTraversal {
public static void main(String[] args) {
int[] numbers = {10, 20, 30, 40, 50};
for(int i = 0; i < numbers.length; i++) {
System.out.println(numbers[i]);
}
}
}

? View Code Example

// Traversing an array using enhanced for loop
class EnhancedTraversal {
public static void main(String[] args) {
int[] numbers = {5, 15, 25, 35};
for(int num : numbers) {
System.out.println(num);
}
}
}

? Interactive Simulator

Visualize how the loop visits every index. Click "Next Step" to iterate.

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

> Console initialized...

? Live Output / Explanation

Output

Each element of the array is printed on a new line in the order it is stored. The enhanced loop automatically accesses elements without using indexes.

✅ Tips & Best Practices

Always use array.length to avoid index errors
Prefer enhanced for loop when index is not required
Use standard loops when you need element positions

? Try It Yourself

Traverse an array of strings and print each value
Find the sum of all array elements
Print only even numbers from an integer array