public class ReverseString {
    public static void main(String[] args) {
        String s1 = "neelendra";
        for(int i=s1.length()-1;i>=0;i--)
            {
                System.out.print(s1.charAt(i));
            }
    }
}

String reverse(String s) { 
   if(s.length() == 0) 
     return ""; 
   return s.charAt(s.length() - 1) + reverse(s.substring(0,s.length()-1)); 
 }