ACF循环中继器值与get_field

I created a Custom Field with the Repeater layout to add some input text. I would like to display all the values. I found some code on ACF documentation but I can't understand how it works

<?php 
$rows = get_field('repeater_field_name');
if($rows)
{
    echo '<ul>';

    foreach($rows as $row)
    {
        echo '<li>sub_field_1 = ' . $row['sub_field_1'] . ', sub_field_2 = ' . $row['sub_field_2'] .', etc</li>';
    }

    echo '</ul>';
}
?>

http://www.advancedcustomfields.com/resources/repeater/

I don't know how much fields I will create with the Repeater and I would like to loop all the values with foreach. Is that possible?

Thank you in advance

Foreach version:

<?php 

$rows = get_field('repeater');
if($rows)
{
    echo '<ul>';

    foreach($rows as $row)
    {
        echo '<li>sub_field_1 = ' . $row['text'] . '</li>';
    }

    echo '</ul>';
}

While version:

<?php

// check if the repeater field has rows of data
if( have_rows('repeater') ):

    // loop through the rows of data
    while ( have_rows('repeater') ) : the_row();

        // display a sub field value
        the_sub_field('text');

    endwhile;

else :

    echo 'nothing found';

endif;

?>