elif selection == "1":
        sn = str(input("Enter the Serial Number : "))  # user enters a SN
        arrayIndex = 0  # used for later

        if len(newSn) != 0:  # only if newSn has data inside then we have to check for duplicates
            for i in newSn:
                if i == sn:  # if inside the newSn already has the SN user has typed
                    arrayIndex = newSn.index(i)  # get the index of where the duplicate SN was found
                    quantity = int(input("Enter the quantity of the ticket : "))  # only change quantity since same SN
                    newQuantity[arrayIndex] = quantity  # find the quantity of the same index to change
                    newQuantity = list(map(int, newQuantity))
                    break  # break so it doesnt continue checking
                elif i == newSn[-1]:  # newSn[-1] means the last item in the list, this means that we have reached the last item and there is no duplicate so we must add new data

                    title = str(input("Enter the title of the Concert : "))  # user enters title
                    price = int(input("Enter the ticket Price : "))  # user enters price
                    quantity = int(input("Enter the quantity of the ticket : "))  # user enters quanitty

                    priceofTotalTickets += (price * quantity)

                    newTitle.append(title)  # add the new data

                    newPrice.append(price)  # add the new data

                    newQuantity.append(quantity)  # add the new data

                    newSn.append(sn)  # add the new SN
                    break  # break so it doesnt continue the loop since we are already done

        else:
            #  here happens because newSn is empty and we have to add our first ticket!
            title = str(input("Enter the title of the Concert : "))
            price = int(input("Enter the ticket Price : "))
            quantity = int(input("Enter the quantity of the ticket : "))
            priceofTotalTickets += (price * quantity)
            newTitle.append(title)
            newPrice.append(price)
            newQuantity.append(quantity)
            newSn.append(sn)

    # you can use this to see the amount of data you have entered
    elif selection == "6":
        print("Serial Number:", newSn[0])
        print("Title:", newTitle[0])
        print("Price:$", newPrice[0])
        print("Quantity:", newQuantity[0])
        print("-----")
        # to see the second item, uncomment if you wanna try and see
        #print("Serial Number:", newSn[1])
        #print("Title:", newTitle[1])
        #print("Price:$", newPrice[1])
        #print("Quantity:", newQuantity[1])