Final answer:
The push() method of the stack is a key operation that involves adding an element to the top of the stack data structure, which follows 'last in, first out' or LIFO principles.
Step-by-step explanation:
The push() method of the stack is a fundamental operation offered by the stack data structure. In computer science, a stack is a collection of elements with two principal operations: push, which adds an element to the collection, and pop, which removes the most recently added element that was not yet removed. When you push an item onto a stack, you are placing it at the 'top' of the stack. The stack follows a 'last in, first out' (LIFO) methodology, meaning that the last element pushed onto the stack will be the first one to be popped off.
Example of the Push Method in a Stack:
Consider a stack of books. If you push a book onto the stack, you place it on top of the previous book.
- Similarly, in programming, if you push a new value onto a stack, you add it to the end of the list, and it will become the next item to be retrieved.