Problem description :
- Stack organizes data into the sequential order. It similar to the stack of books in a library or stack of dishes in the kitchen as shown below.
- It is similar to linked list. Linked list has a head attribute whereas Stack has top attribute.
Linked list is usually visualized horizontally from (left to right ) whereas Stack is visualized vertically (from bottom to top).
Stack data structure supports two basic operations : push and pop as shown below.