# What Is Data Structure Stacks?

//

Larry Thompson

Data structures are essential concepts in computer science that allow us to organize and manipulate data efficiently. One such data structure is the stack. In this article, we will explore what a stack is, how it works, and its various operations.

What is a Stack?
A stack is a linear data structure that follows the Last-In-First-Out (LIFO) principle. It can be visualized as a stack of books where you can only access the topmost book. This means that the last element added to the stack will be the first one to be removed.

Stack Operations:
A stack supports three primary operations:

• Push: Adds an element to the top of the stack.
• Pop: Removes and returns the topmost element from the stack.
• Peek: Returns the value of the topmost element without removing it.

## Implementation of Stack

There are several ways to implement a stack, but one common approach is using an array or a linked list.

Array-based Implementation:
In this approach, we use an array to store elements and keep track of the topmost element’s index. Let’s take a look at some code snippets for implementing basic operations on a stack using an array:

“`html

``````<script>
class Stack {
constructor() {
this.items = [];
this.top = -1;
}

push(element) {
this.top++;
this.items[this.top] = element;
}

pop() {
if (this.isEmpty()) return "Stack Underflow";
const removedElement = this.top];
this.top--;
return removedElement;
}

peek() {
if (this.isEmpty()) return "Stack is empty";
return this.top];
}

isEmpty() {
return this.top === -1;
}
}

// Create a new stack
const stack = new Stack();

// Push elements onto the stack
stack.push(10);
stack.push(20);
stack.push(30);

// Print the topmost element
console.log(stack.peek()); // Output: 30

// Pop an element from the stack
console.pop()); // Output: 30

</script>``````

“`

Alternatively, we can use a linked list to implement a stack. Each node of the linked list will contain an element and a reference to the next node.

“`html

``````<script>
class Node {
constructor(element) {
this.element = element;
this.next = null;
}
}
class Stack {
constructor() {
this.top = null;
}
push(element) {
const newNode = new Node(element);
newNode.next = this.top;
this.top = newNode;
}
pop() {
if (this.top.element;
this.top = this.next;
return removedElement;
}
peek() {
if (this.element;
}
isEmpty() {
return !this.top;
}
}
Applications of Stacks
Stacks find applications in various domains, including:

Expression evaluation and syntax parsing.
Function call stack in programming languages.
Undo/Redo functionality in text editors.
Backtracking algorithms.

In conclusion, a stack is a fundamental data structure that follows the Last-In-First-Out principle. It can be implemented using arrays or linked lists, allowing for efficient insertion and removal of elements. Understanding stacks and their operations is crucial for building efficient algorithms and solving complex problems.

What Is the Data Structure of Stacks?

What Is the Data Structure of Stacks? A stack is a fundamental data structure in computer science that follows the Last-In-First-Out (LIFO) principle. It is an abstract data type that represents a collection of elements, where elements are added and removed from only one end called the top.

What Are Stacks Data Structure?

A stack is a fundamental data structure in computer science that follows the Last-In-First-Out (LIFO) principle. It is like a physical stack of plates where the last plate placed on top is the first one to be removed. In programming, a stack allows operations only at one end – the top.

What Is Stack Data Structure?

A stack is a fundamental data structure in computer science that follows the Last-In-First-Out (LIFO) principle. It is a collection of elements where the addition and removal of items occur only at one end, known as the top of the stack. This makes it a highly efficient and easily manageable data structure for certain types of operations.

What Do You Mean by Stack Data Structure?

A stack is a linear data structure that follows the Last-In-First-Out (LIFO) principle. It is a container of objects that are inserted and removed according to the last-in-first-out order. In simpler terms, the last item added to the stack is the first one to be removed.

What Is Stack Data Structure Explain With Example?

Stack is a fundamental data structure in computer science that follows the Last-In-First-Out (LIFO) principle. It is often compared to a stack of plates, where the last plate placed on top is the first one to be removed. In this article, we will explore the concept of a stack data structure and provide an example to illustrate its usage.

What Is Stackin Data Structure?

What Is Stack Data Structure? A stack is a linear data structure in computer science that follows the Last-In-First-Out (LIFO) principle. It’s similar to a stack of plates where the last plate placed is the first one to be removed.

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