How to render TWIG output to a variable for later use (symfony2)?

Question

Instead of doing this rendering of each slide in my TWIG like this (see line 6):

{# loop out the slides #}
{% for c in contents %}
    {% set i=i+1 %} {# increas         


        

Answer 1

Within a twig template, you can set the value of a printed variable like this:

{% set rendered %}
  {{ var_to_print }}
{% endset %}