How to make a loop counter in a django template?

Question

Django

Django. I output a cycle of articles in the template through for.
How to make a counter. Type i. That is, in the for block, there was a variable i inside.
That is, I need to change the class name of the div after 3 cycles.

Answer 1

{{ forloop.counter0 }} - starts from zero
{{ forloop.counter }} - starts from one.

Answer 2

https://docs.djangoproject.com/es/1.9/ref/template...