Stack

What is a Stack? A stack is an abstract data type that serves as a collection of elements and implements operations like push, pop, and peek at the end in O(1) time. It uses the LIFO (last in, first out) order. For example, a stack can be a collection of items where adding or removing is practical at the top. Code Example struct Stack<Element> { private var array: [Element] init(array: [Element] = []) { self....