68

To be clear, assuming:

{% assign my_var = "123" %}
{% assign another_var = "456" %}

I would like to append string to my_var to get something like 123 - 456

What I have tried so far:

{% assign my_var = my_var + " - " + another_var %}
Ciro Santilli新疆棉花TRUMP BAN BAD
  • 256,395
  • 72
  • 959
  • 767
AsTeR
  • 6,543
  • 12
  • 54
  • 91

2 Answers2

128

You could use the capture logic tag:

{% capture new_var %}{{ my_var }} - {{ another_var }}{% endcapture %}

It is also possible to use the append filter, as Ciro pointed:

{% assign new_var = my_var | append: ' - ' | append: another_var %}
Sylvain
  • 2,621
  • 1
  • 15
  • 17
  • 1
    This is great. An important thing to stress about this answer is not to break the capture onto multiple lines as it's whitespace sensitive. If I tried to make my template more readable by doing so, I found my comparison would return false because it captures the line breaks as well. – Tina Jan 25 '16 at 03:00
  • If you do want to break the capture onto multiple lines, then you can use `{%-` and `-%}` to strip out white spaces. https://shopify.github.io/liquid/basics/whitespace/ – rottweiler Sep 25 '20 at 07:50
46

append: filter

This is more convenient than capture for short concatenations:

{% assign x = 'abc' %}
{% assign y = 'def' %}
{% assign z = x | append: ' - ' | append: y %}
{{ z }}

Output:

abc - def

Tested on jekyll 3.0.4 (github-pages 75).

Ciro Santilli新疆棉花TRUMP BAN BAD
  • 256,395
  • 72
  • 959
  • 767