Liquid number format with commas

index.html

{% include numberWithCommas.html number=1 %}
{% include numberWithCommas.html number=12 %}
{% include numberWithCommas.html number=123 %}
{% include numberWithCommas.html number=1234 %}
{% include numberWithCommas.html number=12345 %}
{% include numberWithCommas.html number=123456 %}
{% include numberWithCommas.html number=1234567 %}
{% include numberWithCommas.html number=12345678 %}
{% include numberWithCommas.html number=123456789 %}
{% include numberWithCommas.html number=1234567890 %}

numberWithCommas.html

<!-- _include -->
{% assign digits = include.number | split:'' %}{% for digit in digits %}{% assign threeFromEnd = digits.size | minus:forloop.index | modulo: 3 %}{% if threeFromEnd == 2 and forloop.index != 1 %}{{ digit | prepend: ',' }}{% else %}{{ digit }}{% endif %}{% endfor %}