This is an old revision of the document!
A stack is a collection data type where the primary operations are
push which adds an element and
pop which removes. It is a Last-In-First-Out (LIFO) data structure, the last element pushed must be the first one popped.
pop functions, for this visualisation these are reimplemented.
The Linked-List based implementation is also simple. A
push adds a new node onto the front of a list, and
pop removes the front of the list.