twig loop template

twig-loop-template.html.twig

{# loop template #}
{% for item in items %}
  {#  assing foo, bar or baz to the var foo then print em out #}
  {%
    set var = [
      cycle(["foo", "bar", "baz"], loop.index),
    ]
  %}
  {% if loop.first %}
  {# first  #} {{ var }}
  {% elseif loop.last %}
  {# last #} {{ var }}
  {% elseif loop.index == "2" %}
  {# test on number #} {{ var }}
  {% elseif loop.revindex = "2"%}
  {# test on numbers left #} {{ var }}
  {% else %}
  {# default #} {{ var }}
  {% endif %}
{% endfor %}

variables for loops:
{{ loop.index }}  - count 1 - n
{{ loop.index0 }} - count 0 - n
{{ loop.revindex }} - revers count n - 1
{{ loop.revindex0 }} - revers count n -  0
{{ loop.length }} - how many loops
{{ cycle(["even", "odd"], loop.index) }} - cycle through vars