Increment value in twig file

Question

I have a loop withing a .twig file that outputs elements.

I need to increment a value withing each element. I know how to do it in PHP, but an not clear how to do it withing a twig document. I can't really do it in controller. Any suggestions?

{% set myVal = 50 %}

{% for item in items%}
     {{ myVal = myVal + 10 }}
{% endfor %}

Answer 1

Use this:

{% set myVal = 50 %}

{% for item in items %}
     {% set myVal = myVal + 10 %}
{% endfor %}

For declaring, setting values, setting blocks/forms, etc. you must use {% %}. For output, there is {{ }}