Question

I am working on recursion.

I need to create a reverseString method in which if i set the parameter like ReverseString(Maruf, 0) then the output will be furaM. But if i enter ReverseString(Maruf, 2)
then the output will be raM. It is removing 2 characters from the reverse.

I have to take 2 parameters.

method signature is this
public static String reverseString(String str, int i){

// Complete the method

}

Example: Starting word is Hello, reversed from index 2 is leH.

Answer 1

public class ReverseStringTest {

    public static String reverseString(String str, int i) {
        if (i == 0)
            return reverseString(str, str.length() - 1);
        if (i == 1) {
            return str.charAt(1) + "" + str.charAt(0);
        } else {
            return str.charAt(i) + reverseString(str, i - 1);
        }
    }

    public static void main(String[] args) {
        System.out.println(reverseString("Hello", 2));
        System.out.println(reverseString("Maruf", 2));
        System.out.println(reverseString("Maruf", 0));
    }
}