Check if item exists into listwidget

I have an input file from where I add items into the listwidget. If the item read from the file is on the listwidget, remove it from the listwidget, if it's not, then add it to the listwidget.
This check (if the item exists into the listwidget) is any other way to be done except a for loop?

Assistant is your friend. Read the page on QListWidget and scan the available methods.

QListWidget::findItems(),
QListWidget::row(),
and QListWidget::takeItem()