Greetings! Today, we're drawing back the curtains on Stacks in Python, a crucial data structure. A stack
is like a pile of dishes: you add a dish to the top (Last In) and take it from the top (First Out). This Last-In, First-Out (LIFO) principle exemplifies the stack. Python executes stacks effortlessly using Lists
. This lesson will illuminate the stack data structure, operations, and their Python applications. Are you ready to start?
A stack
is an elongated storehouse permitting Push
(addition) and Pop
(removal) operations. It's akin to a stack of plates in a cafeteria where plates are added (pushed) and removed (popped) from the top. No plate can be taken from the middle or the bottom, exemplifying a Last-In, First-Out (LIFO) operation.
To create a stack, Python employs a built-in data structure known as a List
. For the Push operation, we use append()
, which adds an element at the list's end. For the Pop operation, there's the pop()
function that removes the last element, simulating the removal of the 'top' element in a stack. Here's how it looks:
