Define stacks . Explain implementation of stacks ?
==> Stacks--
- A stack is linear Data Sturcture in which items are added (pushed, inserted) and removed(pop, deleted) from one end called top.
- A stack is a container of objects that are inserted and removed according to the last-in first-out (LIFO) principle. In the stacks only two operations are allowed: push the item into the stack, and pop the item out of the stack