Question

Given the strings s1 and s2 that are of the same length, create a new string s3 consisting of the last character of s1 followed by the last character of s2, followed by the second to last character of s1, followed by the second to last character of s2, and so on

Answer 1

package lastsecondlast;

public class LastSecondLast {
    public static void main(String[] args) {
        String s1 = "Hello"; //string one
        String s2 = "World"; //string two of same length
        String s3 = ""; //resultant string
        int temp = s1.length()-1; // calculating length of string
        
        for(int i=0;i<s1.length();i++) //loop to get resultant string
        {
            s3 = s3 + s1.charAt(temp); //adding alternatively alphabets of both string
            s3 = s3 + s2.charAt(temp);
            temp--; //decrementing variable to go to second last element and so on
        }
        System.out.println(s3); //printing resultant string
    }
}

Output:-

Since no language was mentioned I did it in Java.

If you want to take user input, you can use Scanner object.

In this example, I have used Hello and World as two strings.

Comment down if you want this program in C++ or Python.

Note:- Please comment down if you face any problem. :)