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TCS• Prep

Reverse Array

Here is the optimized solution in Java. Copy or view it below.
Java
package Problems_on_Arrays;
import java.util.Scanner;

public class ReverseArray {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("enter the number of elements:");
        int n=sc.nextInt();
        int[] arr=new int[n];
        for (int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        int[] res=new int[n];
        int counter=0;
        for (int i=n-1;i>=0;i--){
            res[counter]=arr[i];
            counter++;
        }
        System.out.println();
        //displaying:
        for (int i=0;i<n;i++){
            System.out.print(res[i]+" ");
        }
        sc.close();
    }   
}