I want to print all of the letters between two letters using recursion and this is how I did it:
import java.util.*;
public class q24 {
public static void between(char a, char b) {
if (a==b) {
System.out.println(b);
}
else {
System.out.println(a+1);
between((char)(a+1), b);
}
}
public static void main(String[] args) {
between('e','l');
}
}
but it's printing:
102
103
104
105
106
107
108
l
how can I make it print letters?
When doing arithmetic operations on char (like a + 1), the result value is automatically converted to int.
In order to have the result of the arithmetic operation printed as char, you will have to do an explicit cast:
System.out.println((char) (a+1));
Moreover, I think you have an error in your implementation : the last character (b) will be printed twice - before the last recursion call, and at the recursion bottom. You can fix it like:
public static void between(char a, char b) {
System.out.println(a);
if (a < b){
between((char) (a+1), b);
}
}
When you are doing a+1in System.out.println(a+1); it is effectively converting char to int and therefore it is printing ints.
Change it to this :- System.out.println((char)(a+1));
