Write a recursive method that will duplicate each character in a string and return the result as a new string. For example, if "book" is the argument, the result would be "bbooookk".

What will be an ideal response?

```
public static String doubleEachLetter(String s){
String result;


if(s.length() == 0)
result = "";
else {
String doubled = "" + s.charAt(0) + s.charAt(0);
result = doubled + doubleEachLetter(s.substring(1));
}
return result;
}
```

This code is in Methods.java.