.. _class_control_if:

control_if
==========

**图块代码**

.. image:: img/control_if.png

----

**javascript**

.. code-block:: javascript

	if(expression){
	}

----

**python**

.. code-block:: python

	if expression:
	

----

**npl**

.. code-block:: lua

	if(expression)then
	end

----

参数
----

+--------------+----------+----------+--------+
| 参数         | 类型     | 默认值   | 说明   |
+==============+==========+==========+========+
| expression   | string   | "true"   |        |
+--------------+----------+----------+--------+

示例
----

.. tabs::

	.. tab:: javascript

		.. code-block:: javascript

			if(true){
			}

	.. tab:: python

		.. code-block:: python

			if true:
			

	.. tab:: npl

		.. code-block:: lua

			if(true)then
			end