## **IF标签**
**用法：**
~~~
{% if 表达式 %}
value1
{% elif 表达式 %}
value2
{% else %}
value3
{% endif %}
~~~
**用法示例：**
~~~
{% if kenny.sick %}
Kenny is sick.
{% elif kenny.dead %}
You killed Kenny! You bastard!!!
{% else %}
Kenny looks okay --- so far
{% endif %}
~~~
