list front() function in C++ STL
The list::front() is a built-in function in C++ STL which is used to return a reference to the first element in a list container. Unlike the list::begin() function, this function returns a direct reference to the first element in the list container.
- This function does not accept any parameter, it simply returns a reference to the first element in the list container.
- This function returns a direct reference to the first element in the list container.
- This function creates an undefined behavior when used with an empty list container.
The below program illustrates the list::front() function.
ele = demoList.front();
cout << ele;
Time complexity: O(1)
Auxiliary Space: O(n) where n is the size of the list
Note: This function works in constant time complexity.
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