Combine variables with text to make variable

Question

How can I create a variable that is a combination of two variables with text?

For example, I know the following is wrong but is something like this possible:

{% set foo = 'foo' %}
{% set bar = 'bar' %}
{% set foobar = 'Hello' foo,bar %}
{{ foobar }} #Outputs Hello foobar

Answer 1

You can concatenate variables like this:

{% set foo = 'foo' %}
{% set bar = 'bar' %}
{% set foobar = 'Hello' ~ foo ~ bar %}
{{ foobar }} #Outputs Hello foobar

It's explained by Brandon here.