Number format for ACF

Hello!
Can you tell me how I can change the number format for a custom field which is displaying a number? Right now, it is showing straight numbers (100000) instead of formatted (100,000). I have found that I should add something in a php file, but I’m not sure which one.
The place I’m displaying the custom field is a custom post.
Thanks!

Hello, adding the code to the functions.php file didn’t work. Do you know what code I should add there?

The code I have to add should be added to the template file “single.php” or similar, but since this is a custom post, I’m not sure which file I should add it to. Do you know?

I’m not sure I understand. Which comma?

Thank you for pointing me that way! It works now. If this helps others, this is the solution that has worked for me: I have added this to the functions.php file (where my number fields are called field_name_1 and field_name_2):

$field_names = [‘field_name_1’, ‘field_name_2’];

foreach ($field_names as $field_name) {
add_filter(“acf/format_value/name={$field_name}”, ‘fix_number’, 20, 3);
}

function fix_number($value, $post_id, $field) {
if (is_numeric($value)) {
$value = number_format($value);
}
return $value;
}