Using enlarged / reduced variables in django templates

Question

Maybe this is a bit silly question, but I did not find the answer. Is there a way to use incremented / decremented variables in django templates?

eg {{ some_variable + 1 }}

Answer 1

There is a filter built in add:

{{ some_variable|add:"1" }}

Answer 2

One way to do this is to use the django template filter.

https://docs.djangoproject.com/en/dev/howto/custom-template-tags/#writing-custom-template-filters

def inc(value):
    return value+1

and then:

{{ some_variable|inc }}

Answer 3

forloop.counter, .

{% for a in object_list %}
{{ forloop.counter }}
{% endfor %}