Java challenge : reverse a string

Question

Someone can help me with this challenge ?
I found this
import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String text = scanner.nextLine();
char[] arr = text.toCharArray();
x= arr[-1];
for(x=0;x<=arr.length;--x){
--x;
System.out.println(text);
}
}
}

Answer 1

import java.util.*;
public class Program
{
public static void main(String[] args)
{
Scanner st= new Scanner(System.in);

String name = st.nextLine();

System.out.println("entered string is\n"+" "+name);
System.out.println("Reversed string is");
for(int x=(name.length()-1);x>=0;x--)
{
System.out.print(name.charAt(x));
}
}
}

Answer 2

x is undeclared.
In java, it won't allow negative indexes.

Your loop do ( assuming valid systax, then) , iterates from x = 0 to arr.length by updating x = x -2 ;// x--; x--; decrease 2, not 1
Prints 'text'. ( which is input just, not reverse string).

Declare x to arr.length-1 as int x = arr.length-1;
condition is x >=0;
Print arr[x];

Answer 3

Ok my new code is ;
import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String text = scanner.nextLine();
char[] arr = text.toCharArray();
int x = arr.length -1;
for(x>0;x<=arr.length;x--){
x--;
System.out.println(arr[x]);
}
}
}

Answer 4

for ( ; x >= 0; x--) {
System.out.print(arr[ x ] ); } // print, not println

//replace this, with your loop.. You declared x before loop so not adding in loop, left empty Initialization.

Answer 5

Thanks a lot 😀