Stack:-

A Stack is a commonly used linear data structure a stack data structure follows particular operations that are performed Stack is behaved like Last in first out (LIFO) In this, we have three basic operations.

1. Push Method
2. Pop Method
3. Peek Method
4. Is Empty Method

Push Method :

The push method is adding data into any type of data into the stack.

Peek Method:

Peek is a very easy operation this method is given you which item or data is on the top of the list so this peek method returns the top element

Pop Method:

Pop is removed the top item from the stack

Is Empty Method:

The is empty method is very important this return if the stack is empty then its return true.

When we use push D is added then call stack on top is D then we use pop then D is removed from the stack.

Stack example using Javascript

//© Inspiration from coding garden class Stack { constructor(){ this.data = {}; this.size = 0; } push(item){ this.data[this.size] = item; this.size +=1 } peek(){ return this.data[this.size - 1]; } pop(){ const item = this.peek(); this.size -= 1; delete this.data[this.size]; return item; } } const launguage = new Stack(); launguage.push("Typescript") launguage.push("Angular"); launguage.push("JS"); launguage.push("C++"); console.log(launguage) console.log(launguage.pop()) console.log(launguage) console.log(launguage.pop()) console.log(launguage) 

Output

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