How to add class on each item using while loop - php

Question

I just want to add a class on each items using the while loop in php. But the problem is it will add only to the item that is greater than 2, not to all items. My goal is to add class "nav-multiple" on all items if the items is exceed to 2.
<ul>
<?php
$index = -1;
// loop through the rows of data
while ( have_rows('property_section_menu_repeater_field') ) : the_row();
$index++;
$title = get_sub_field('property_section_menu_repeater_subfield1');
$unique_id = get_sub_field('property_section_menu_repeater_subfield2');
?>
<li class="nav-item <?php echo $index >= 2 ? 'nav-multiple' : ''; ?>">
<a class="nav-link p-0" href="#<?php echo $unique_id; ?>"><?php echo $title; ?></a>
</li>
<?php endwhile; ?>
</ul>
Current output:
<li class="nav-item">
<a></a>
</li>
<li class="nav-item nav-multiple">
<a></a>
</li>
The output that i want to achieve:
<li class="nav-item nav-multiple">
<a></a>
</li>
<li class="nav-item nav-multiple">
<a></a>
</li>

Answer 1

Okay I solved it now by using php count() function and foreach loop
<ul>
<?php
$rows = get_field('property_section_menu_repeater_field');
// loop through the rows of data
foreach($rows as $key => $row):
$title = $row['property_section_menu_repeater_subfield1'];
$unique_id = $row['property_section_menu_repeater_subfield2'];
?>
<li class="nav-item <?php echo count($rows) >= 2 ? 'nav-item-multiple' : ''; ?>">
<a class="nav-link p-0" href="#<?php echo $unique_id; ?>"><?php echo $title; ?></a>
</li>
<?php endforeach; ?>
</ul>