boucle for symfony with number code example

Example 1: twig loop variables

{% for user in users %}
    {{ loop.index }} - {{ user.username }}
{% endfor %}

Example 2: how to for loop twig

{% for i in 0..10 %}
    * {{ i }}
{% endfor %}

Example 3: how to for loop twig

{% for letter in 'a'..'z' %}
    * {{ letter }}
{% endfor %}

Example 4: index first twig

{{ loop.index }}
OR
{{ loop.index0 }}