Stack Implementation in C

DSA stands for Data Structure and Algorithms. It is a field of computer science that deals with the study of organizing and manipulating data efficiently.

In the context of DSA, a stack is an abstract data type that follows the Last In First Out (LIFO) principle. It is a linear data structure that allows operations such as push (inserting an element) and pop (removing the topmost element).

A stack can be implemented in C using an array or a linked list. In the array implementation, an index variable is used to keep track of the top element, and push and pop operations involve updating this index. In the linked list implementation, each node contains the stack element and a pointer to the next node, and push and pop operations involve updating the pointers.