(LIFO) last in first out

LIFO stands for "Last In, First Out" and refers to a method of data storage and retrieval in which the last item added to a collection is the first one to be removed. It's a concept used in computer science, data structures, and algorithms, and it's commonly used to implement Stack data structures.

In LIFO, elements are pushed onto the top of the stack, and the last element added is the first one to be popped off the top. The LIFO method is useful in many applications, such as reversing the order of elements, processing elements in the order they were received, and creating an undo functionality in software applications.