Thread: Substring

I want to write a program which cut letters from the end of a string until the last letter is the same as first. For example:
"kokota" --> "kok"
"alinak" --> "alina"
"kocur" ---> k etc.
I tried doing it like this:

import java.util.Scanner;
 
public class zad681 {
    public static String funkyFunction (String s) {
 
        for(int i = s.length() - 1; i > 0; i--){
            if(s.charAt(i) == s.charAt(0)){
                s.substring(0, i);
            }
        }
        return s;
    }
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("Wprowadź zdanie:");
        String content = scan.nextLine();
        String[] words = content.split("\\s+");
        for(int i = 0; i < words.length; i++){
            System.out.println(zad681.funkyFunction(words[i]));
        }
 
        System.out.println(zad681.funkyFunction("ala ma kotka"));
    }
}

And program prints s string so its content isn't modified.
I think using substring and charAt is good idea. Thank you from your answers.

cut letters from the end of a string until the first letter is the same as frist.

Can you describe in English what the steps are that the program needs to take to do that?

Once we agree on what steps the program must take, work on the code to do it.


Note: The substring method returns a String that needs to be saved. The original String is not changed.