Calculating the sum of all odd array indexes

Question

I want to calculate the sum of all odd array indexes, but I\'m having some trouble finding the right way to do it.

Here\'s my code so far:

    String id         


        

Answer 1

There is no Index 13 in this array as in Java index starts from 0. A solution to calculating the sum of all odd array indexes with Java 8 is:

    String id = "9506265088085";
    String[] strArray = id.split("");

    int sum = IntStream.range(0, strArray.length)
            .filter(idx -> idx % 2 == 1)
            .map(idx -> Integer.parseInt(strArray[idx]))
            .sum();

    System.out.println(sum);