Question

Here is my code:

import java.util.*;

public class Multiply {
    public static void main(String[] args) {

        LinkedList<Integer>num = new LinkedList<Integer>();
        num.add("1");
        num.add("2");
        num.add("3");
        num.add("4");
        num.add("5");

        product( num );
    }

    public static void product(LinkedList<Integer> list) {
        int index = 0;
        Iterator<Integer>productw = list.iterator();
        Integer next = productw.next()

        while (productw.hasNext()) {
            index++;
            System.out.println("The product of the numbers is = " + num);
        }
    }
}

Answer 1

Initially have a multiplication identity ( i.e., 1 ) before your while loop. And keep multiplying to it the iterator values.

Psuedo – code :

public static void product(LinkedList<Integer> list) 
{
    Iterator<Integer>productw = list.iterator();
    int result = 1;
    for( int i=0; i<productw.size(); ++i ) {
        result *= productw.get(i) ;
    }
    // result has the answer
}

Edit 1:

The above loop assumes that the list has at least 1 element. If list has no elements, then zero must be the answer which I assume you can easily program it.