# size

**Description :** The list::size() is a built-in function in C++ STL which is used to find the number of elements present in a list container.
    
**Example** :
```cpp
    // Creating a list 
    std::list<int> demoList; 
  
    // Add elements to the List 
    demoList.push_back(10); 
    demoList.push_back(20); 
    demoList.push_back(30); 
    demoList.push_back(40); 
  
    // getting size of the list 
    int size = demoList.size(); 
  
    std::cout << "The list contains " << size << " elements"; 

```
**[Run Code](https://rextester.com/MJW36296)**