## ds_list_size——获取列表内容数量
#### **语法:**
```javascript
ds_list_size(id);
```
参数 | 描述
|---|---|
id | 指定的列表数据结构索引值
#### **返回:**
Real
#### **描述:**
这个方法用于获取列表的长度,即列表中当前包含多少项内容的数量。
#### **示例:**
```javascript
if !ds_list_empty(control_list)
{
num = ds_list_size(control_list);
}
```
以上代码首先判断了control_list这个列表是否为空,如果不是空列表则获取列表的项目数然后把值存储到变量num中。
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