Day 7: Arrays - HackerRank 30 days of code solution

Objective
Today, we're learning about the Array data structure. Check out the Tutorial tab for learning materials and an instructional video!

Task
Given an array, , of  integers, print 's elements in reverse order as a single line of space-separated numbers.

Input Format

The first line contains an integer,  (the size of our array).
The second line contains  space-separated integers describing array 's elements.

Constraints

• , where  is the  integer in the array.

Output Format

Print the elements of array  in reverse order as a single line of space-separated numbers.

Sample Input

4
1 4 3 2

Sample Output

2 3 4 1

Solution :

import java.io.*;

import java.util.*;

import java.math.*;

 

public class Solution {

 

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);

        int n = in.nextInt();

        int[] arr = new int[n];

        for(int i=0; i < n; i++){

            arr[i] = in.nextInt();

        }

        in.close();

        for(int i = 0; i < arr.length / 2; i++){

            int temp = arr[i];

            arr[i] = arr[arr.length - i - 1];

            arr[arr.length - i - 1] = temp;

        }

        for(int j=0; j < arr.length; j++){

            System.out.print(arr[j]+" ");

        }

        

    }

}