How should liquid/jekyll logic tags be used?

Question

I explain myself, Here a code example I tried:

{% assign a=1 %}
{% if a==1 %}
<h1>'a' is equal to one!</h1>
{% else %}
<h1> 'a' is NOT equal to one!</h1>
{% endif %}

The output is:

'a' is NOT equal to one!

What's going on?

Answer 1

在==运算符周围保留一些空间：

{% if a == 1 %}