let numberOfItems = 0;
    let itemIndex = 0;
    let itemNum = 0;
    let counter = 0;
    while (numberOfItems < 10) {
        numberOfItems = prompt("Enter the number of items in the auction (must be >= 10)")
    }

    const itemCode = [];
    const itemDescription = [];
    const itemReservePrice = [];
    const itemHighestBid = [];
    const itemNumberOfBids = [];
    const itemSoldStatus = [];
    const itemBuyerCode = [];
    for (itemIndex = 1; itemIndex <= numberOfItems; itemIndex++) {
        counter = 1;
        if (itemIndex === 1) {
            itemNum = prompt("Enter the unique item number: ");
        }
        while (counter < itemIndex) {
            if (counter === 1) {
                itemNum = prompt("Enter the unique item number: ");
            }
            if (itemNum === itemCode[counter]) {
                alert(`The item number: ${itemNum} already exists!`);
                counter = 0;
            }
            counter++;
        }
        itemCode[itemIndex] = itemNum;
        itemDescription[itemIndex] = prompt("Enter the item description.");
        itemReservePrice[itemIndex] = prompt("Enter the item reserve price: ");
        itemHighestBid[itemIndex] = 0;
        itemNumberOfBids[itemIndex] = 0;
        itemSoldStatus[itemIndex] = false;
        itemBuyerCode[itemIndex] = 0;
    }