need help please

Question

public class Problem01 {

/ *
* Description: the average methodPosGenap will return the average value
* of all the array elements that have numbers
* even index (0.2,4,6, ....).
*
* @param array of numbers with the number of elements n,
* where 100> n> 1
*
* @return the average value of all the array elements
* numbers that have even indexes
* /

public double rerataPosGenap(int[] data){

//kode program kamu diletakkan disini
int sum = 0;
for (int i = 0; i < 10; i++)
{
sum = sum + data[i];
} return 0;//0 is default value and can be change
}
}

Answer 1

What is your doubt? Maybe you can do your own code and ask about doubts