Reverse an Array in Java

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Q. Write a Java program to reverse an array

import java.util.Scanner;

public class ReverseArray {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Input array size
        System.out.print("Enter the number of elements in the array: ");
        int n = scanner.nextInt();

        int[] arr = new int[n];

        // Read array elements
        System.out.println("Enter " + n + " integers:");
        for (int i = 0; i < n; i++) {
            arr[i] = scanner.nextInt();
        }

        // Reverse the array in-place
        for (int i = 0; i < n / 2; i++) {
            int temp = arr[i];
            arr[i] = arr[n - 1 - i];
            arr[n - 1 - i] = temp;
        }

        // Display the reversed array
        System.out.println("Reversed array:");
        for (int i = 0; i < n; i++) {
            System.out.print(arr[i] + " ");
        }

        scanner.close();
    }
}
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Q. Write an algorithm to reverse an array

1. Start
2. Read n (size of array)
3. Read n elements into array arr[]
4. Loop from i = 0 to n / 2 - 1:
    a. Swap arr[i] with arr[n - 1 - i] using a temporary variable
5. Print the reversed array
6. End
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