public class Practice4 {
public static String reverse(String s) {
int length=s.length();
String r="";
for(int i=length-1;i>=0;i--) {
char ch=s.charAt(i);
r=r+ch;
}
return r;
}
public static void main(String[] args) {
String e;
e=reverse("abcd");
System.out.printf("%s",e);
}
}
