Hi, can someone help me with this? (java)

Question

I am doing a program that reverse a string, the code:
import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String text = scanner.nextLine();
String a = "";
char[] arr = text.toCharArray();

for (int x=arr.length; x>=0; x--) {
a += arr [x];
}
System.out.println (a);
}
}

and in the line 10 (a+=arr [x] ) I have an error, but I don't know how can I fix it, does anyone know the answer?

Answer 1

It should be like so,
x = arr.length - 1

Because suppose we have
arr = "Pablo"
arr.length = 5 (0ut of index error)

But array starts with 0 so we know that the max index we can have for "Pablo" is 4.

Answer 2

thanks, I understand it now