Need a hand on this code!

Question

public class Clerk {

GroceryStore myStore;

public void takePosition(GroceryStore store) {
myStore = store;
}

public double ringUp(GroceryItem[] item) {
double total = 0;
int itemNumber = 0;
while (item[itemNumber] != null) {
total = total + item[itemNumber].price;
System.out.println(item[itemNumber].name + " " +
item[itemNumber].price);
itemNumber = itemNumber + 1;
}
System.out.println("TOTAL " + total);
return total;
}

public void pay(double amount) {
myStore.money = myStore.money + amount;
}
}

Answer 1

Take a look at these guides on how to ask a question.
https://stackoverflow.com/help/how-to-ask
https://www.sololearn.com/blog/38/8-simple-rules-to-get-help-from-the-community

Answer 2

while (itemNumber < item.length &&
item[itemNumber] != null) {